How to Hard Reset Nokia Lumia & Microsoft Lumia Phones 8
If you want to hard reset your Nokia Lumia or Microsoft Lumia phones because of reasons like security code or software malfunction, do the following below.Note.You will lose all files after this process. Backup your files.
Turn of the devicePress Power buttonWhen phone vibrates leave power button and press volume down button till you see exclamation sign ! Now press the following button combinationVolume up - Volume down - Power - Volume DownPhone will reboot and you will see gear wheel spinning .Wait for process to complete. (Can take about 8-30mins)Phone will reboot after process is complete..
Turn off the device
Press and hold volume down - Camera - Power button for about 10 secs
When phone vibrates release power button but still hold on to volume down and camera button
Phone will start reset process
Wait for it to complete.. Can take about 8 - 30mins
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