Before you give your handset to repair shop or buy new handset, please try the following procedure to repair your device. First charge your battery more then 70%, backup your important data like phone-book, message, email, images and settings and in most cases take out SIM card and SD card. After doing hard reset not possible to recover your data, so online backup is always important. For all of your data, a backup should be done on a external device, hard drive, raid system media or SD card.
How to Hard Reset Google Nexus One
Reset via menu
- Go to Settings
- Go to Privacy
- Go to Factory Data Reset
- Tap the Reset.
Hard Reset Via button
- Turn off your device.
- Press and hold the Volume Down button and press and release the Power button.
- You'll boot into the menu you see above with the little skateboard guys. Select Clear Storage from the list by pressing the Volume Down button.
- Press the Power button, and confirm by pressing Volume Up.
- Sit back while your phone reboots in its virgin state.