Muting silences notifications but doesn’t block messages. To unmute:
The group text should now be active again. You will receive new messages from this thread moving forward.
Once the individual is unblocked, new messages sent to the group should appear in your inbox again. Note that you cannot recover messages sent while the contact was blocked. Verify iMessage and MMS Settings how to unblock group text on iphone
I can then provide specific steps for your exact software version.
If you aren't receiving messages from a group because you blocked one of the participants, iOS will often prevent the entire thread's notifications from reaching you. To fix this, you must unblock the individual. Open the Settings app. Scroll down and tap on Messages. Tap on Blocked Contacts. Swipe left on the name or number you want to unblock. Tap Unblock. Muting silences notifications but doesn’t block messages
Blocking a single contact stops their messages (including in group threads) from reaching you. To unblock:
If it is an SMS/MMS group, you cannot "leave" in the same way; you must ask the creator to delete the thread and start a new one including your number. Once the individual is unblocked, new messages sent
Once you have unblocked the contacts, the old group chat may not immediately appear in your main message list if it has been a long time.
The process is simple, but Apple doesn’t have a single “unblock group” button—you must unblock individuals or unmute. Most “blocked group text” cases are actually just muted threads or unknown sender filters.