I have a Samsung Galaxy Note 4 (N910a), and the WiFi doesn't work. I think it's because it has an old firmware version, so I tried to update it, but when in recovery and trying to update from the SD card, it says "Update from external storage is disabled." the same thing happens with adb.

  • Did you try through Odin/Heimdall? – esQmo_ Dec 9 '16 at 15:46
  • And please check if the WiFi MAC adress is still present. – esQmo_ Dec 9 '16 at 20:00
  • Yes, there is a mac address, but the WiFi button is grayed out... – user166681 Dec 10 '16 at 18:06
  • Do you have network connection? Does the Bluetooth work? – esQmo_ Dec 10 '16 at 22:21
  • The Bluetooth works, and it doesn't let me connect it to wifi – user166681 Dec 10 '16 at 22:22

Try flashing the stock firmware with Odin. This should work. Stock firmware download here Odin flasher download here

  • Open Odin

  • Unzip the firmware zip file

  • Click on APP and browse to where you extracted the firmware zip file

  • Boot the phone to Download mode (Volume down + Power button)

  • Connect the phone and click Start.

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