My certified pre-owned Galaxy Note 3 downloaded the update last night and I installed it earlier this morning (Jan 13, 2015). After it installed and rebooted it would not connect to any cellular network. Cycling Airplane Mode seemed to get the voice connection to work, but not data. Restarting the device sometimes breaks the voice connection and I have to cycle airplane mode again. I've also noticed that it now seems to take a lot longer to power off. Is there anything besides a factory reset I might try?