Samsung Galaxy S4 won't send text messages.

[henryawesome]

I can call people and receive texts but I can't send them.

Anyone know how to fix this?

 

[QP Mihai]

Go to your carrier's webpage and find the Message center number. Make sure it matches the number set in Messaging > Settings > Message center.
Sometimes this number is different for each type of client. (contracts, prepaids, etc.)

 

[Northern.dj]

Check to see if the phone has branded firmware if so it's a setting they added called RCS you need to disable this
Failing that it needs debranding

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