Sending texts
I can’t send texts - I get the undelivered message and to try again. I can receive though. If I send a pic, I text and send with the pic. That’s the only way I can text - on my iPhone
iPhone SE, iOS 15
Question marked as
Are these SMS messages (green)? Or iMessages (blue)? If they are green, contact your carrier. If they're blue, make sure that you have an active WiFi or data connection.
See also:
If you can't send or receive messages on your iPhone, iPad, or iPod touch - Apple Support