Have you seen this article If you can't send or receive messages on your iPhone, iPad, or iPod touch - Apple Support?
All day my phone has been going off saying I have a text message that didn’t send 87 days ago that makes that April 1 I went through al my messages and have found no such messsge when I click on the notifications it doesn’t go anywhere its 4 in the morning and it won’t stop please it driving me up the wall
2 replies
You can reset your phone too. On off button 30 sec. till you see turn off your phone.
Message failed to send