I understand how important it is keeping up with a group. Allow me to provide some assistance in this matter.
This forum thread outlines the exact process to get your group messages working, in short you’ll do the following steps:
Step 1 Tap Settings > Scroll down and tap Messages > Scroll down to SMS/ MMS
and disable the feature.
Step 2 Go back to Settings > Tap on General > Scroll down and tap Reset > Select Reset Network Settings > Enter your pass-code > Tap Restart Network Settings
Step 3 Turn Messaging back on by performing the step in step 1, go back the messages. You will see MMS Messaging. Enable text messaging by sliding the button to the right. You may need to turn your phone off and back on to restore text functionality.
I hope you have a great day!
Alex, AT&T Community Specialist
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