If people receiving your SMS messages wish to unsubscribe (no longer receive text messages from you) then all they need to do is reply ‘Stop’, ‘Unsubscribe’, ‘Cancel’ or ‘Remove’ to your sent message.

Once Texta receives one of these, then the contacts details will be copied to the suppression list and their status in the list will be changed to unsubscribed.

To be safe you should also process the opt outs against all other lists.

Opt-outs and unsubscribes have the same meaning.