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WARNING! When you factory reset your phone all of your personal data stored on the phones internal memory will be deleted, including ringtones, downloaded content, contacts and so on. Furthermore all of the phones settings will be restored to factory values.
NOTE: Before proceeding with the factory reset, you can visit this thread for a guide on how you can back up and restore data on the Microsoft Lumia 640 XL.
Master Reset from Settings:
- Swipe the Start screen left and go to apps
- Open Settings
- Swipe to and tap about
- Tap reset your phone
- You will receive a warning message. Read the information and tap yes to proceed
- Tap yes again to confirm and wait for the phone to reset
Master Reset Using Hardware Buttons:
NOTE: The method above is simpler but assuming that you are unable to use it (perhaps your phone crashes / freezes etc.) then alternatively you can reset your phone by performing a combination of hardware key presses. To do this:
- Turn off the phone
- Press and hold Volume Down
- Press and hold Power to turn on the phone
- Release Power when the phone vibrates once, but make sure Volume Down is still pressed
- Once the phone displays an exclamation mark, release Volume Down too
- Perform the following sequence (keep in mind that while you do so, the screen will not change):
- Press Volume Up
- Press Volume Down
- Press Power
- Press Volume Down
- Your device should now start the factory reset. This can take about 5 minutes, during which you should see two gears rotating on the screen
Check for OS Updates:
NOTE: After applying a factory reset you should always make sure that your OS version is up to date. To do this:
- Swipe left on the Start screen
- From the applications screen, go to Settings
- Tap About > more info
- Check the Firmware version number and assuming that a newer version is available, follow the on-screen prompts to download and install it on your device
› See More: Microsoft Lumia 640 XL: Factory Reset & Check for Updates
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