Pmga boss share ko lang po ang pwedi solution dyan, if they blocked the sim.. go to engineering mode on your phone, find sim settings, or network integrity, nan jan lang yan.. (read) or if ayaw kumapit yung proxy dahil naka subscribed ka sa promo.. like palaging na disconect!! solution: go to play store download power app.. then on power app menu find uninstall.... Restart ur fon.. BOOOOMMMMM!!!!! PROBLEM SOLVED!!!!!!!