I always have this problem with my HTC One -M8, after some time, my phone will lose wireless data connection, with a triangle mark on the left up corner of my phone, when clicked, it says: Warning: Unable to establish a wireless data connection. LTE:ESM-65535. I tried to turn on/off the radio, to clear data in phone process, to update profile from zone or software update, and many more, nothing works, only reset/power cycle works to bring back the wireless connection. What is that? Anybody know?