Majority of <b>GSM GPS tracker</b> today uses cellular technology to remotely communicate with these devices. <p>You will need a SIM card to enable tracking services to work and communicate with the tracker remotely via the phone number associated with the SIM card. Some use text messaging to locate the tracker, other devices use data connection. Either way, our service offer voice call, text and nationwide 4G LTE Data. <p><b><i>Our service will work within the United States including Canada & Mexico roaming.</b></i> <p> Check Coverage at <b>STKMap</b> <p> <p> To activate please visit us at <b>ActivateSpeedTalk</b>. <p> After SIM activation, it may take up to 24 hrs for the GPRS and data settings to sync and update with your device. Make sure to turn on your device in an area with strong reception. <p>Our SIM cards can be used with any GSM tracking device such as but not limited to: <p> <li>GPS Trackers <li>Kid GPS Trackers <li>Pet Trackers<li>Trackers for Seniors <li>Car Alarm Systems <li>Smart Watches </li> <p><p>Buyer needs to contact the manufacturer or seller of their (defective/not working) 3rd party device.<br><br><i>Please Note: 2G & 3G services might not be available in all areas due to carrier decommissioning/ shutdown of these frequencies, SpeedTalk Mobile recommends using 4G or newer devices for better service. Existing SpeedTalk customers who are using the service on their 2G or 3G devices, can continue purchasing SpeedTalk products to refill/reup their existing accounts</i>. <p> <p>SpeedTalk offers its services through subscription plans which auto-renew every 30 days. Service begins as soon as you activate your service. You'll be charged the rate stated at the time of purchase, every month, until you cancel. There is No Contract, Cancellations can be made any time by contacting customer support. A valid credit card is required to cover overages in case you exceed the applicable Voice, SMS and Data limits.