Downgraded from 8.2 beta 3 had a few resprings, now running 8.1.2 and seems every 5-10 min while using my phone the screen becomes unresponsive/froze. Tried DFU restoring, set up as new, redownloaed the IPSW... Just about everything I could think of! Even when not using the phone ex: the alarm went off I went to swipe to turn it off no go! Sat there for a good 45sec constantly swiping with no response from the screen. Apple WILL tell me this is a hardware issue but is it really? No issues before 8.1.2 and no issues on 8.2 beta. Any advice would be appreciated!