Turning off airplane mode in the power menu makes the option greyed out and still no service. Device Model Information: Device Name: Samsung Galaxy S7 edge HELP, Film mode greyed out on Samsung c6620. Select System on the System and Security screen. 3G (UMTS) or 4G (LTE) enables you to achieve higher data speeds than when using 2G (GSM). In About Phone> SIM Status>: Network - Unknown. RELEVANT POST: How to fix Ten Common Network or Connection Issues with Galaxy A50 Reset How to change 2G to 3G only, Edge to 4G only network mode: Samsung Galaxy J5 SM-J510F (2016) To change from 2G to 3G only, Edge to 3G only, 2G to 4G LTE only or Edge to 4G simply go to Android Settings > Wireless & Networks > Mobile Networks > Select The SIM card > Network Mode. Aftyer 30 to 45 seconds your Samsung phone will reboot and be completely factory reset resulting in the screen passcode and google account being completely removed from your account.
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