If you've blocked a caller on your iPhone and want to unblock them, follow these steps:
Just remember: unblocking allows communication to resume, but it won’t restore the past. If you need to recover lost messages or call history, you’ll need a separate iCloud or iTunes backup. iphone unblock caller
Once you've unblocked the caller, they will be able to call and text you again. If you've blocked a caller on your iPhone
If you've blocked a caller from the Messages app, you can unblock them from there as well: iphone unblock caller