My HTC one m7 phone started to reboot every few minutes after an OTA update yesterday. The phone is an unlocked phone bought from HTC website. Never been unlocked or rooted. All OTA updates. Tried factory reset and wipe cache partition as discussed in some forum. The problem persists. Right now, cannot even get into settings so I am not sure what is the version of the update. Any idea what happened. Before update everything worked fine except a bit slowness.