people can't call my s3 after I have already unblocked them I enabled blocking mode &amp; blocked 1 contact. After that the person can't still contact me eventhrough I have unblocked that contact already. How to fix this problem?
"Blocking mode" has nothing to do with blocking individual contacts. It stops all calls and other notifications disturbing you, like a "do not disturb" mode. If you want people to call you, turn off blocking mode.