HTC One - can't receive or send text/calls
Recently purchased an HTC One off ebay and been using on the T-Mobile network under the remainder of the contract. Signal is not great where I live so tried a couple of free signal booster apps yesterday and have since been unable to send or receive calls or texts. Internet works fine on wifi and mobile network. Phoned T-Mobile tech support today and tried a couple of things and also went to one of their stores who tried the sim in another phone and sim worked fine. Did a reset but problem still exists. Have tried a couple of scans with free anti-virus apps but nothing picked up. Can I try anything else or will I need to take to a mobile repairer?