1. AC Question's Avatar
    I'll go to turn my wifi switch on, it will move to the on position, but nothing happens. Then shortly after I've switched to on, I'll get an error message on the wifi toggle screen. The message just says error. The same outcome as well when I try to turn blue tooth, or my hot spot on. Every now and then I'll look at my phone and they all will be on then stop functioning again.
    02-12-2017 09:33 AM
  2. belodion's Avatar
    Try a Cache Partition wipe, and get back to us if no go.

    02-12-2017 11:57 AM
  3. B. Diddy's Avatar
    Welcome to Android Central! Also, see if it happens in Safe Mode as well: https://support.t-mobile.com/docs/DOC-27781
    02-13-2017 03:49 AM
  4. sarahgad's Avatar
    Hey, this is what you can do.
    A Factory Reset is supposed to fix this issue . Assuming that there is no on-going hardware errors, you can try to isolate the problem by going to Safe Mode and testing the Wi-Fi connection again. To bring your phone to Safe Mode:

    Switch Off your Samsung Galaxy S4 completely
    Power it ON Again
    While booting continuously keep pressing the left button beside the home button.
    Continue to press it still the boot is completed and you can see the home screen
    Once you’re in Safe Mode, pull down the notification bar and try to turn on Wi-Fi (it should). After the Wi-Fi is activated, press and hold the power button on the right side your phone then select “Restart”. After the phone reboots, the Wi-Fi feature should be working normally.

    If this doesn’t help, try removing the battery while the phone is still on, then power on the phone again.
    If not through again, try taking it to a technician there can be problems with the hardware.
    02-13-2017 04:53 AM

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