Before you buy a new cell phone or new tablet, please try the following procedure to repair your device. First charge your battery, backup your important data if possible and in most cases take out SIM and SD card before 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.!
Microsoft Surface hard resetHow to Factory Reset Microsoft Surface RT.
To reset your Surface without logging in, please try the following:
1. Attach your Touch Cover / Type Cover.
2. Power on your Surface.
3. Press and hold the Left Shift key at the Login screen.
4. Press the Power icon.
5. Press Restart
Your surface should boot to a light blue screen with some options on it.
1. Click on Troubleshoot.
2. Click on Reset your PC.
3. Follow the prompts.
How to reset surface?
1. Factory Reset.
Go to tap Applications list > Settings > about > reset your tablet.
Press Windows key and Power buttons together, same as Alt+Ctrl + Del on previous Windows OS.
You can use Backup and Restore Center to restore backups.
As last resort you can restore the factory image from the recovery partition. The recovery partition on a Microsoft Surface unit is a hidden partition on the drive. You should not delete this partition to free disk space, because the partition contains a copy of the factory image.
To restore the factory image
Turn on your device and press the BACKSPACE key.
Press F8 key.
Select Repair your computer and hit ENTER
After the recovery wizard (keyb. layout, user, pass etc.)
Select cmd Command prompt, and then open the D:\recovery directory.
Enter recovery.cmd and then hit the ENTER key. Wait until it finishes.
After restarting the device you need to go through the setup wizard.