How SMS Works | HowStuffWorks How SMS Works Text messaging has replaced talking on the phone for some users. Jupiterimages/©Getty Images/ Thinkstock Just when we're finally used to seeing everybody constantly talking on their cell phones , it suddenly seems like no one is talking at all. Instead, they're typing away on tiny numerical pads, using their cell phones to send quick messages. SMS, or text messaging, has replaced talking on the phone for a new "thumb generation" of texters. In this article, we'll find out how text messaging works, explore its uses and learn why it sometimes takes a while for your text message to get to its recipient. Up Next Is texting while driving really worse than drunk driving? SMS stands for short message service. Simply put, it is a method of communication that sends text between cell phones, or from a PC or handheld to a cell phone. The "short" part refers to the maximum size of the text messages: 160 characters (letters, numbers or symbols in the Latin alphabet). For other alphabets, such as Chinese, the maximum SMS size is 70 characters. But how do SMS messages actually get to your phone?

If you have read How Cell Phones Work , you can actually see what is happening. Even if you are not talking on your cell phone, your phone is constantly sending and receiving information. It is talking to its cell phone tower over a pathway called a control channel. The reason for this chatter is so that the cell phone system knows which cell your phone is in, and so that your phone can change cells as you move around. Every so often, your phone and the tower will exchange a packet of data that lets both of them know that everything is OK. Your phone also uses the control channel for call setup. When someone tries to call you, the tower sends your phone a message over the control channel that tells your phone to play its ringtone . The tower also gives your phone a pair of voice channel frequencies to use for the call. The control channel also provides the pathway for SMS messages. When a friend sends you an SMS message, the message flows through the SMSC, then to the tower, and the tower sends the message to your phone as a little packet of data on the control channel.

In the same way, when you send a message, your phone sends it to the tower on the control channel and it goes from the tower to the SMSC and from there to its destination. The actual data format for the message includes things like the length of the message, a time stamp, the destination phone number, the format, etc. For a complete byte-by-byte breakdown of the message format, see this page . SMS Attacks Recently it has been suggested that SMS messages could be used to attack a cell phone system. The basic idea is very simple. If a large number of SMS messages were sent by computers to phones in a small geographical area (like a city), these messages would overwhelm the control channels and make it impossible for the cell phone system to set up calls. Now that cell phone providers know about the possibility of this threat, they can design systems to throttle messages coming from the SMSC onto the network. 1 Free Text Messaging - Send Free Text Messages to Any Provider of SMS Texting. Tired Of SMS Text Messaging Fees? Text For Free! Tired of paying to send text messages? Now you can send free text SMS messages to almost any major cell phone provider in the world. If we are missing your favourite, let us know.

It's 100% free, with no gimmicks! Txt2day is spam free text messaging. That's right, we won't send you unwanted text messages or share your phone number with anybody. Stop spending and start texting. Getting Unwanted Messages? Send and receive text messages (SMS) - Outlook Outlook Applies To: Outlook 2010 More... Less With Microsoft Outlook 2010 and Office Mobile Service (OMS) or a Microsoft Exchange Server 2010 account, you can send and receive text messages (SMS). But beyond just sending and receiving text messages, you can also configure Outlook to send notifications to your mobile device as a text message. For example, you can receive an alert on your mobile device that an important e-mail message has arrived — you can even have the e-mail message forwarded as a text message. You can also have Outlook calendar summaries sent to your mobile device. There are two ways to use text messaging with Outlook 2010.

Use an Exchange Server 2010 account to connect to a Windows Mobile device running Windows Mobile 6.5 Or subscribe to a third-party Short Message Service (SMS) provider using OMS In this article Set up text message (SMS) notifications Advantages of text messaging (SMS) in Outlook Communicating with a wireless device by sending e-mail messages can be awkward — not all mobile devices can connect to an e-mail account, and accessing e-mail messages on a mobile device is typically slower and more difficult than reading text messages. An easier way to send and receive text messages is with your computer and Outlook 2010. With Outlook, you can send messages to multiple people simultaneously, and a full-sized keyboard enables you to write messages more quickly and comfortably. Also, incoming messages are received in your Outlook Inbox. You can save your text messages just as you would with an e-mail message. This helps you maintain an ongoing record of your mobile communications. Finally, you can configure Outlook to send important notifications to your mobile device. Top of Page Features of text messaging (SMS) in Outlook Text messaging (SMS) Send text messages (SMS) to one or more wireless devices from Outlook.

With the Outlook text message interface, you can choose recipients from your Outlook address book, type a message, add emoticons, and then preview the message on a simulated phone screen before clicking Send. Incoming text messages are delivered to your Inbox. You can then move messages to a folder or do many of the same actions, including forwarding, flagging, or categorizing that you already do with e-mail messages. Calendar summaries Even when you are away from your computer, you can stay on top of your Outlook calendar. Configure Outlook to send a text message summary of your schedule to your mobile device each day. Mobile reminders Get helpful appointment reminders no matter where you are. A text message reminder of upcoming appointments and events can be sent to your wireless device automatically. Mobile notifications Have important e-mail messages sent to your mobile device as a text message. In addition to notifying you when you receive a new e-mail message, the content of the e-mail message can be forwarded as a text message. Use Outlook rules to choose which messages are forwarded and the notifications that are sent to your mobile device. Set up text messaging (SMS) in Outlook There are two ways that Outlook can send and receive text messages.

With an Exchange Server 2010 account Outlook can send messages to a phone running Windows Mobile 6.5 or later. Third-party text messaging service If you don’t have an Exchange Server 2010 account, you can use a third-party text message (SMS) service that sends and receives text messages on your behalf. Note: Third-party text messaging service providers may charge a fee for this service. This charge is in addition to any charges from your mobile carrier. Microsoft Exchange 2010 with an existing phone To use text messaging in Outlook with an existing phone requires an Exchange Server 2010 account and a Windows phone running Windows Mobile 6.5 or later with a data plan. In this configuration, Outlook uses Exchange 2010 and Exchange Active Sync to communicate with your Windows Mobile 2010 phone to send text messages (SMS) using your existing wireless service. Security Note: For security reasons, a digital certificate may be required for your phone to connect to the Exchange Server. For more information about configuring Exchange Server to work with mobile phones, see Deploying Phones with Windows Mobile 6.5 on Microsoft Exchange Server 2010.

On your mobile phone running Windows Mobile 6.5, on the Home screen, choose Exchange ActiveSync, choose Menu, and then choose the Configure Server tab. If the phone has never been synchronized with Exchange Server, Add Server Source appears. In Enter Email Address, type your e-mail address and then choose Next. In Edit Server Settings, if your Exchange Server address does not appear automatically, restart this procedure, or contact your network administrator. Enter your user name, password, and domain name, and then choose Next. Make sure to select the Save password check box. Select the Text Messages checkbox. You can also select other content to synchronize. Choose Finish. An e-mail message confirmation is sent to your Outlook e-mail account. Wait several minutes, and then restart Outlook. Third-party text messaging (SMS) service This is the simplest and quickest method of enabling OMS, but you might be required to pay an additional monthly fee for the service. In this scenario, Outlook communicates with a third-party SMS provider to send text messages. To select and subscribe to a third-party service, do the following: On the Home tab, in the New group, click New Items, and then click Text Message (SMS).

In the Configure a Text Messaging (SMS) account dialog box, click Next In the Outlook Mobile Service Account dialog box, click Find a text messaging service for your mobile operator. In the Hosting Providers Web application, choose the country or region in which you have wireless service. Choose your wireless service provider. If service is available in your area, links to third-party text messaging (SMS) providers appear. Click the link for a provider, and then follow the instructions on your screen for subscribing to SMS and configuring a new Outlook account. In Outlook, when asked if you want to add an account in Microsoft Outlook for this Web service, click Yes. Send a text message (SMS) After setting up your text messaging service, you can use Outlook to send text messages (SMS). Important: To send text messages in Outlook, the texting service in Outlook must be enabled. For more information, see Set up Office Mobile Service . To send a text message (SMS): On the Home tab, in the New group, click New Items, and then click Text Message (SMS). In the Text Message window, type or choose a recipient, and then type your message. To insert an emoticon, on the Text Message tab, in the Insert group, click an emoticon.

Preview your message in the Preview pane, and then click Send. Set up text message (SMS) notifications You can configure Outlook 2010 to send text notifications to your mobile device to: Alert you to upcoming calendar events Summarize your calendar schedule for the coming day Forward specific email messages Important: To use text notifications, the text messaging (SMS) service in Outlook must be enabled. For more information, see Set up Office Mobile Service . Click the File tab. Text message (SMS) troubleshooting | T-Mobile Support Feature on your profile Text message (SMS) troubleshooting Created by tmo_brian on Apr 2, 2012 11:50 AM. Last modified by tmo_marty on Dec 23, 2016 2:58 PM. Version 29 Troubleshoot problems sending or receiving text messages using T-Mobile's network. Cannot send and receive SMS Place a call to the number you are trying to message to check whether the number is working. On My T-Mobile , the primary account holder can check if the line has Message blocking or Family Allowances set to block any calls.

Turn off Wi-Fi and Wi-Fi Calling to see if you can send and receive messages on the T-Mobile network. T-Mobile cannot improve your Wi-Fi network. Delete messages or message threads from your phone or SIM memory and test again. Uninstall any third-party messaging apps. For Apple devices, check whether the message is being sent through iMessage . If it is, see iMessage help instead. For Android devices: Clear the Messages or Messaging app cache. See your device how tos > Apps & Data > Manage apps. Check your message blocking settings. See your device how tos > Messages & Email > Manage messages. Check that the SMSC number is programmed correctly as +12063130004. See your device how tos > Messages & Email > Manage messages. Turn your phone off and then back on. Send a text message to your own 11-digit mobile number to check whether you still cannot send and receive texts. Do not use any symbols, signatures, or attached files. The message "Receiver Number unable to receive message. Message blocking active" means that the person receiving the text message has message blocking enabled. The text message recipient needs to contact their provider.

If you are using a non-T-Mobile phone, place your SIM card in a T-Mobile-branded phone to test. If the problem does not happen with the T-Mobile phone, the problem is with the phone. Contact your phone manufacturer for help. If you are still having this issue, contact us . Cannot send or receive SMS with international numbers Check whether you can send messages to domestic numbers. Send a text message to your own 11-digit mobile number. If it fails, see Cannot send and receive SMS, above. Turn your phone off and then back on. Make sure that you are using a plus + sign or 011 before the country code and phone number. Do not use the phonebook entry. Instead, manually enter the phone number. For how to enter international phone numbers, see International calling codes . Test sending and receiving a text message with the international number. Do not use any symbols, signatures, or attached files. If you are still having this issue, contact us . Error: "Message Blocking Active" If you get this error when sending a text to a specific person, ask your recipient to check their message blocking setting with their provider.

On My T-Mobile , your primary account holder can check if the line has Message blocking or Family Allowances set to block any calls. Delete messages or message threads from your phone or SIM memory and test again. Turn the device off and then back on. Send a text message to your own 11-digit mobile number to check whether you still cannot send and receive texts. If you are still having this issue, contact us . Incorrect time stamp Check the time and date is correct on your phone. Check out the user manual or how tos for your device on the Devices page. Send a text message to your own mobile number to test the time stamp. If you are using a non-T-Mobile phone, place your SIM card in a T-Mobile branded phone to test. If the problem does not happen with the T-Mobile phone, the problem is with the phone. Contact your phone manufacturer for help. Duplicate messages Check whether the duplicated messages are coming from multiple numbers or from one sender. If they are from one sender, ask the sender if they sent the messages more than once. Delete messages or message threads from your phone or SIM memory and test again. Turn the device off and then back on.

If it is an Apple device, reset Network Settings (choose Settings > General > Reset, then scroll down and tap Reset Network Settings). If you are still receiving duplicate messages, contact us . Delayed messages Delete messages or message threads from your phone or SIM memory and test again. For Apple devices, check the message is not being sent through iMessage . If iMessage is failing, the phone will wait and then revert the text to a text message after a delay. Turn your phone off and then back on. Send a text message to your own 11-digit mobile number to check whether you can send and receive texts. Do not use any symbols, signatures, or attached files. If you are still cannot send or receive texts, contact us . Can't use short codes Make sure of the following: You're not sending to international short codes. We do not support sending to international short codes. Your account is not Simple Choice No Contract. That account type restricts premium services and short codes. If you have an Android device, short codes have been enabled. On your device, check whether the signal does shows roaming on another network. Short codes do not work while roaming. If you still cannot use short codes, contact us .

Create and send a text message - Outlook Outlook Applies To: Outlook 2007 More... Less Text messaging can often be the quickest and most convenient way to contact someone who is on the move. Outlook Mobile Service makes it easy to create and send text messages to mobile devices from your computer. To send text messages, you must first add and configure an Outlook Mobile Service account. What do you want to do? Create a new text message On the File menu, click New, and then click Text Message. Enter the recipient's e-mail address or mobile phone number in the To box. To search for a recipient in an address book, click the To button. Type your message in the message body. If you want, you can insert emoticons in your message. On the Text Message tab, in the Insert group, click Emoticon String, and then click an emoticon that you want to insert. Top of Page Specify the maximum number of text messages Each text message has a default character limit that is specified by the mobile service provider. If you type more characters than this limit in a single text message, then the extra characters are moved automatically to a new message.

You can see the total number of messages into which your original message is divided and the contents of each message in the preview pane. You can specify the maximum number of text messages to send at one time. On the Text Message tab, in the Options group, enter the number that you want in the Maximum Messages box. For messages that are divided into more messages than this number, the extra messages are not sent and appear shaded in the preview pane. Top of Page Send a text message To send a text message that you have created, you need to specify its recipients. You can either choose recipients from one of your address books, or enter them directly into the To box of your message. Enter recipient information. After your text message is sent successfully, it appears in the Sent Items folder with next to the subject title to indicate that it is a text message. Note: Before you can send a text message, you must have at least one valid recipient in the To, Cc, or Bcc box. In addition, the message body cannot be empty. Use the automatic name fill-in feature (AutoComplete) If you partially enter a recipient’s name in the To box, use the AutoComplete feature to complete the name before you send your message.

On the Text Message tab, in the Names group, click Check Names. The Check Names dialog box lists possible recipient names that are close to the partial names that you entered. Select the correct recipient names, and then click OK. If there are multiple partial names in the To box, AutoComplete lists possible names related to each partial name in turn. All addresses and mobile numbers that are valid are underlined. Save a text message You can save your new text message in one of three ways: Click the Save button on the Quick Access Toolbar. On the File menu, click Save. Press ALT+F, and then A. If you close a message window that contains text or media that is not saved, you will be prompted to save your message. Click Yes to save and close the window, No to close the window without saving, or Cancel to return to the message window. If you click Yes, your message is saved automatically to the Drafts folder. The subject of the draft message is the first 30 characters (including spaces) in the message body. Open the draft of a text message Click the Drafts folder in the Navigation Pane. All draft text messages are indicated by next to the subject title.

Double-click the message that you want to open, or select it by using the arrow keys and then press ENTER. Text Messaging | FAQs | U.S. Cellular Text Messaging FAQs 1) What is Text Messaging? Text Messaging enables you to send, receive and reply to short text messages from your digital phone to most other digital wireless phone users. You can either purchase an unlimited messaging package or send messages for just 25¢ each. 2) What are the benefits of Text Messaging? Discreet: A message is not intrusive, and you can use it when it is better to text. Convenient: You can message any U.S. Cellular subscriber, as well as many wireless carriers. Cost effective: Incoming messages are always free, and you can send messages for less than 25¢ per message, depending on your Text Messaging plan. Text Messaging does not affect the minutes of your current voice pricing plan. 3) What is a PIN and why do I need one? A PIN is a six digit number that you'll need when registering for U.S. Cellular 's online account management service. This will be sent to you via text message after completing the first step in the registration process.

We do this to protect your account from being accessed without your knowledge. 4) How do I remove Text Messaging from my account? To remove Text Messaging at anytime, contact Customer Care at 611 from your wireless phone, or 1-888-944-9400 from your landline phone or write to us . 5) What are the benefits of having an e-mail address for my wireless phone? Having an e-mail address for your wireless phone enables you to receive text messages from e-mail, send messages to an e-mail address and reply directly to them from your U.S. Cellular phone. Your 10-digit wireless phone number followed by "@email.uscc.net" is your U.S. Cellular wireless e-mail address, so it's easy to remember. 6) What are the available Text Messaging Plans? Check out our Text Messaging Page for detailed information on all of our available plans. For text-only service plans designed to meet the needs of the Deaf and Hard of Hearing, please visit our text-only plans page . 7) Is Text Messaging available in all U.S. Cellular markets? Text Messaging is available to all U.S. Cellular digital customers, and in various Prepaid Wireless areas.

8) To whom can I send a message? U.S. Cellular customers, as well as customers using wireless carriers who support text messaging. Please note: You may be able to send messages, but the recipient may not have a text messaging capable phone. 9) Where does Text Messaging work? To send and receive a text message, you MUST be within a coverage area that a) has the same digital technology as your home coverage area and b) is on the U.S. Cellular network or c) on one of our inter-carrier partners. 10) What is the maximum length of a text message? From wireless phone to wireless phone: Each text message is limited to 150 characters, including spaces and punctuation. If a message is longer than 150 characters, the remainder will be lost, resulting in incomplete messages being received. Note: Some handsets may have a smaller character limit. From the U.S. Cellular Web site to a wireless phone: Each text message is limited to 150 characters. This is for the message only and does not include the 'To' and 'From' fields.

Using an e-mail address from the wireless phone: There is a maximum 120-character limit when sending a text message to an e-mail address from your wireless phone. Characters in the 'To', 'From', and 'Subject' fields count towards the 120-character limit. Using a text messaging e-mail address from any computer to wireless phone: E-mail messages sent from any computer to your wireless phone can be a maximum of 400-characters, but will be split into separate messages of up to 120-characters each. 11) How do I receive notification that a message has been sent to me? The method of notification varies depending on your specific phone model. Most phones offer both visual and audible notification. Please consult your manual for details or view our phone directory to view phone manuals online. 12) What number format should I use to send a message? You MUST use the full 10-digit number in order for the message to be sent. If the 7 or 11 digit number is used, the message will not be sent (e.g. 414 555 1234). The phone may not indicate that the message has NOT been sent.

13) What happens if I am on the phone or have my phone turned off when a message arrives? Your phone must be turned on in order to receive messages and for the audible and visual notifications to function. If you are on the phone, the message will be delivered once you end the call. You must also be in the digital portion of your home service area. 14) Will my phone automatically save the messages I send and receive? Once delivered to your phone, the messages are stored within the phone. However, if you do not delete the old messages and your phone's memory becomes full, new messages will not be delivered until you delete old messages. Messages you send are also stored by the phone, using memory, until you delete them. Please check your user manual for more details. 15) How many messages does my phone hold? This varies depending on your specific phone model. Refer to your user manual for details. 16) After I send an Internet message, will I receive confirmation that the message has been received? Unfortunately, we cannot provide confirmation of message receipt. 17) Can my phone receive e-mail messages?

Yes, all text messaging customers can receive e-mail sent to your 10-digit wireless phone number followed by @email.uscc.net (i.e. 6305551212@email.uscc.net) which is your e-mail address. When you want to send a text message to an e-mail address, simply enter the recipient's e-mail address in the 'To' field. Outgoing messages and replies are charged as text messages. All incoming messages are free and unlimited. Learn about our different e-mail options. 18) Where can I get more information on my handset? Refer to the manual that came with your wireless phone at the time of purchase. 19) Can I set my phone to receive text messages but not incoming calls? Some phones allow you to set a "message mode" or "pager mode," which means it will not ring but will still alert you when a text message is received. Refer to your user manual for details.

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Cancel Messaging Services Text Messaging FAQs This page explains the ins and outs of text messaging, how to send and receive texts with your mobile device and ways to archive your messages. Expand All What is a text message (SMS)? A text message is a short, typed message you send or receive on a mobile device. Text messages have a 160-character limit and can contain letters, numbers and special characters, like punctuation marks. They may also include links and emoticons. You can send and receive text messages to other mobile devices and email addresses directly from your mobile device, while keeping your communication short and private. It's a quick and easy way to stay in touch with your friends and family when you aren’t able to step away for a phone call. If you don't have a mobile phone, you can send a text message to someone in any of following ways: Email application (e.g. Outlook®, Hotmail®, Yahoo!® Mail, etc.) Text messaging website on the internet (e.g. Verizon Messages in My Verizon) PC with messaging software Any device capable of text messaging What's the difference between a text message and an alert? An alert is a notification that appears on your device, letting you know that some type of information has been delivered.

An alert can be any of the following: A notification of a text message or voicemail message A reminder from an app (e.g., an upcoming event on your calendar) An information alert about today's weather, horoscopes, stocks, news, sports scores, etc. A text message is a typed message sent to your device. It can come from another mobile phone, tablet or other text messaging device or website. How much does text messaging cost? Text messaging charges vary by plan: Unlimited messaging - Send and receive as many texts as you want without paying additional fees. If you're already subscribed to The Verizon Plan or The MORE Everything® Plan , unlimited messaging is included. We're encouraging all customers to consider the new Verizon Plan. You'll get and keep more of your data with Carryover Data , Safety Mode and other great benefits as well. Learn more about the new Verizon Plan . Messaging allowance - A set number of messages is included in your monthly plan (e.g., 1000 messages). Each message you send or receive is deducted from that amount with no additional charge. If you exceed that allowance, your messages are billed individually at a "pay as you go" rate.

Pay per message - Each message you send or receive is billed individually at a set rate that's outlined in your plan. If you aren't sure how text messages are billed on your current plan, you can find that information on the following pages in My Verizon: Standard monthly accounts - My Plan page in My Verizon Prepaid accounts - My Plan page in My Verizon for Prepaid How do I sign up for text messaging? Text messaging is automatically included with your wireless service. Your plan determines if and when you’re charged for messages. With The Verizon Plan you get unlimited domestic and international messaging while in the US. For plans that don't include a text messaging allowance, you can pay for text messaging on a pay-as-you-go basis. Get more plan flexibility and international options with the new Verizon Plan . The new Verizon Plan gives you more data, Carryover Data and other great benefits as well, like unlimited calling to Mexico and Canada for only $5/month per line. Plus you can take your domestic talk, text and data allowances with you to Mexico and Canada for $2/day (included on XL or larger at no additional charge). To change your text messaging plan, go to the Change Your Plan page in My Verizon. Where is text messaging currently available?

Please refer to the Verizon Wireless Coverage Locator for further information. Is text messaging available with prepaid plans? Yes, text messaging service is automatically included with every new activation. Messaging rates vary according to your selected prepaid plan . What's the character limit of a text message? You can include up to 160 characters in a standard text message. Multimedia messages can have up to 1000 characters. The 160-character limit includes the sender's email address (if applicable), the composed message and, if provided, the subject and callback number. Receiving Text Messages Expand All How do I know if a text message has arrived on my device? Most devices have both audible and visual notifications when a message has been received. Generally, if an envelope icon appears on your screen, it means you've gotten a text message. Device-specific visual instructions about text messaging are available for many newer devices on our Interactive Simulator page. Select your device from the list and click on the Text Messaging section. If your device isn't listed, refer to your device's User Guide for details. If I have my device turned off, will I still receive text messages?

If a message is sent to you while your device is off, or while you're traveling outside of the Verizon Wireless coverage area, your message will be stored for later delivery. Your device must be turned back on and have coverage for the message to be delivered to you. The network will attempt to deliver the message for 5 days (120 hours) from the date of receipt. Messages not delivered within 5 days will be deleted. If my device's memory is full, will I still receive text messages? When the device's memory is full, you may not be able to send or receive messages. Memory capacity varies by make and model of the device. You'll receive a warning that the memory is almost full or already full (message varies by device). When the memory is full, you'll have to delete old messages in order to receive new incoming messages. If I'm on a call, will I still receive text messages? We support the ability to talk and text simultaneously, but this varies by device. If you're on a call, most devices will let you continue receiving messages, while others will deliver messages after the call is completed. Can I receive text messages while outside the Verizon Wireless network?

Yes, refer to the Verizon Wireless Coverage Locator to look up available text message coverage areas. Can I receive text messages from mobile devices on other wireless carriers? Yes, you can receive messages from people who subscribe to other carriers. How do I opt-out or unsubscribe to a Short Code Text Messaging program? From your phone, text or reply STOP in the body of the message to the program's Short Code. A confirmation of the cancellation will be sent to your phone as a text message. Sending Messages Expand All Who can I send messages to? You can send text messages to most 10-digit mobile numbers in the US, Canada and Puerto Rico. You can also send messages to any email address in the world. If you’re already subscribed to The Verizon Plan or The MORE Everything Plan , then international messaging while in the US is included with your plan. If you're on another plan, you can still send international text messages for an additional charge. Refer to the International Services While in the US page for more information. Get more plan flexibility and international options with the new Verizon Plan . The new Verizon Plan gives you more data, Carryover Data and other great benefits as well, like unlimited calling to Mexico and Canada for only $5/month per line.

Plus you can take your domestic talk, text and data allowances with you to Mexico and Canada for $2/day (included on XL or larger at no additional charge). How can I send a text message? You can send a text message from: A mobile phone

Question: What are SMS messages sent by?
Answer: Mobile phone