Nokia 500 hard reset

Turn off your phone. Plug in charger and charge it fully. Do not plug out the charger. Try this key combo: press CALL + both Volume  + Lock + power ON together.  Leave comment. If your screen is responding also try to dial *#7370# or  *#7780#

OR Press volume UP key then green call key then lock key and press power red key. It is possible that it won't work.

Restore original settings
If your phone is not working properly, you can reset some settings to their original values.
1 End all active calls and connections.
2 Select Menu > Settings and Phone > Phone management > Factory settings > Restore.
3 Enter the lock code.
This does not affect documents or files stored on your phone.
After restoring the original settings, the phone switches off, and then on again. This may take longer than usual.

After resetting, the device may take a longer time to switch on. Documents and files are unaffected.

Your documents and files will be deleted in the reset, so back up your data first.
• Update your device software regularly for optimum performance and possible new features, as explained in the user guide.

Remove all content and restore settings to the default values
1 Back up the content you want to keep to a compatible memory card (if available) or to a compatible computer.
2 Close all active connections and calls.
3 Select Menu > Settings and Phone > Phone management > Factory settings >
Delete data and restore Nokia 500.
4 If prompted, enter the lock code.
Phone management
5 Your phone switches off and then on again. Check carefully that all your personal content, such as contacts, pictures, music, videos, notes, messages, mails, presentations, games and other installed applications have been removed.
Content and information stored on the memory card or SIM card is not removed.

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.