Nokia Lumia 730 hard reset: On the start screen, swipe left, and tap Settings > about > reset your phone...

Nokia Lumia 830 hard reset: On the start screen, swipe left, and tap Settings > about > reset your phone...

Nokia Lumia 638 hard reset: On the start screen, swipe left, and tap Settings > about > reset your phone...

Nokia Lumia 530 hard reset: On the start screen, swipe left, and tap Settings > about > reset your phone...

How to hard reset Nokia 225 hard reset: Resetting your phone Go to Menu > Settings > Reset phone > Select Reset phone > Select OK....

How to hard reset Nokia 130 hard reset: Resetting your phone Go to Menu > Settings > Reset phone > Select Reset phone > Select OK....

How to hard reset Nokia 215 hard reset: Resetting your phone Go to Menu > Settings > Reset phone > Select Reset phone > Select OK....

Nokia 220 hard reset: Press left soft key (LSK) to enter Menu. Navigate to gear icon, Settings > Restore factory set. >

Nokia 100 hard reset:

Nokia Lumia 930 hard reset: On the start screen, swipe left, and tap Settings > about > reset your phone...

Nokia Lumia 635 hard reset: On the start screen, swipe left, and tap Settings > about > reset your phone...

Nokia Lumia 630 hard reset: On the start screen, swipe left, and tap Settings > about > reset your phone...

How to hard reset Nokia Asha 200: Resetting your phone Go to Menu > Settings > Reset phone > Select Reset phone > Select OK....

How to hard reset Nokia Asha 201: Resetting your phone Go to Menu > Settings > Reset phone > Select Reset phone > Select OK....

How to hard reset Nokia Asha 202: Resetting your phone Go to Menu > Settings > Reset phone > Select Reset phone > Select OK....

How to hard reset Nokia Asha 203: Resetting your phone Go to Menu > Settings > Reset phone > Select Reset phone > Select OK....

General advice: Before you buy a new cell phone or new tablet, please try the following procedure to repair your device in a software way. First charge your battery, backup your important data if possible and in most cases take out SIM and SD card before doing factory reset. It is impossible to recover your data after doing a hard reset, so online backup is always important. For all of your data, a backup should be done on an external device, hard drive, raid system or media. With or without insurance, if your cell phone lost, damaged or stolen at least your invaluable data is backed up in a safe place. If you are about to sell your phone and you want to wipe your personal data, or if your phone affected with virus you have to do a hard reset. In some cases, you can delete the forgotten password or lock pattern from your device as well. All information is for devices with stock based ROMs. If you are using rooted device, always back up your EFS folder first, containing your IMEI info, etc.! Please also note, that a hard reset operation will not unlock your mobile phone's SIM lock or network lock, but it will remove the unlock pattern, remove the user password or PIN password (NOT the SIM card's 4 digit PIN code). Also note that the firmware version will not be affected in any way, it will not be downgraded, it will remain the same you are using and if you have rooted your device, root privileges remain also unaffected.