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 Lenovo ET980
For system reset and keep SDRAM data. click the Reset key with the touchpen, which will restart the system. If the fault does not disappear, power on the mobile phone with cold boot operation
- Hold the ON/OFF key and the RESET key together for at least 5 seconds and then release these two keys simultaneously. Any exchanging of the main battery should be finished within 20 minutes.
- Otherwise the backup battery may fail to support features such as the system clock, which may lead to power-on failure.
Attention: The cold boot operation will lead to the loss of system clock settings. If the fault doesn’t disappear after cold boot, choose "Restore factory settings".
Note: The steps of "Restore factory settings": Press the RECORD key and the roller’s Down key simultaneously, and then click the RESET key with the touchpen. In the middle of the screen displayed, choose OK item continuously with the Roller key, and then press the Roller Confirm key