Text messages not delivered

Petfurniture4 wrote:

I have iPhone 12 and some messages to multiple recipients are not delivered. I can’t see a pattern to it. Sometimes they go through to a group, sometimes they don’t. Any help much appreciated.

start here If you can't send or receive messages on your iPhone, iPad, or iPod touch - Apple Support

Also contact your cell phone provider, MMS is their feature.

I had the same problem recently with T-Mobile. Call your provider, they can run a test and trouble-shooting your eventual SIM card problem. Doesn't sounds like a problem related to your iPhone.