1. AC Question's Avatar
    Hi, I am having problems with signal in samsung galaxy s4
    I can do everything normally unless i lock screen, i have signal etc. but if I click the power button to lock the phone it automaticly loses signal and i have to turn on/off flight mode to get signal back. Then here goes same story click power button = lose signal= no msgs/calls.
    Anyone knows how to fix it?
    My device is not rooted and its android 4.3.
    08-02-2014 03:14 PM
  2. B. Diddy's Avatar
    Welcome to Android Central! Did that just start, or did it happen after a recent system update?

    Try booting into Recovery Mode and wiping the system cache partition: Reset: Samsung Galaxy S 4 | T-Mobile Support
    08-02-2014 04:08 PM

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