The WiFi software and its settings seem to be an issue. On my GN, turning off WiFi , seems to increase signal strength for 4G. I normally display 1-2 bars on 4G inside my apartment, with WiFi off I normally get 2-3 bars consistently. If I change advance settings of WiFi, such as WiFi sleep options, the phone experiences a random reboot shortly thereafter, or an os file (system) FC'ing a short time later. I changed WiFi band preference from auto to 2.4, then tried to answer the phone after about 20 minutes, phone reset again. I turned off WiFi and reset the phone, no problems for 48 hours so far. The WiFi software seems to be an issue, IMO.