Why my Alcatelonetouch is failed to send tex?

Alcatel onetouch 1016 dual - very simple phone has stopped sending tex since last week. It says "send failed". It can receive tex, can make calls but can't send any tex. I need to know what's wrong with it. Yours faithfully, Rika Shortland

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See if you accidentally deleted the APN settings.

https://support.t-mobile.com/docs/DOC-29...

Change them to match your carrier (not necessarily T-Mobile)

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