Unblock phone from unknown callers

You may also want to try Settings > Phone > Silence Unknown Callers. Set that to Off. I had to do that recently. I was missing calls from my doctor’s office. The main line was in my contacts. The nurse kept calling from one of their other lines … which were not in my Contacts. Until I got their other lines in my contacts, this resolved the problem.

Go to -> Settings->Phone->Show My Caller ID -> turn it On.

I want to unlock the no color ID

unbluck the no caller ID