Can't Send or Receive Group Messages. Android Samsung Galaxy 20 plus; AT&T
Today's date is 4/18/2021. Since android software update that I did on 4/15/2021, I can no longer send or receive group text messages. I see messages come in from but they wont' download, so I can not read them. If I try to send a group message - it just says message failed to send after some time.
The update I did on 4/15/2021 is Software version is N986U1UEU2DUCB.
Here is what I tried to do:
1. restart phone.
2. wipe cache.
3. reset access point names
4. take out sim card & reseat
5. reset network connections
All these fail to resolve the issue.