In order to send SMS to all contacts together, follow the steps below in our bulk SMS panel:
Click on compose SMS appearing in the main menu.
Now click on add or group option from your contacts.
Now select the sender id from which you want the message to be delivered. (you can add recipients from your contact list or groups created by you, lists or your frequently used contacts)
Now type or paste the text that you want to be delivered.
After completing all of the above steps, click on preview text or send.
And you’re done!