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.!
Resetting your Acer E400 smartphoneResetting your smartphone
You may have to perform a reset if your smartphone fails to respond when buttons are pressed or the screen is tapped.
Pressing the Reset button interrupts power and restarts the smartphone; it will not erase personal information, but you may lose information from open applications. The Reset button is found under your smartphone’s battery cover, next to the SIM slot.
Note: Before performing a reset, ensure that your smartphone is not locked. Press any
key or tap the screen to see if the phone responds.
Acer E400 Clean bootA clean boot will restore your smartphone to the factory settings.
Warning! You should only perform a clean boot when all other options have failed to
restore your smartphone to an operational state.
Warning! This will erase all your personal information, any contacts stored on your
phone and any programs you installed.
It will not erase information from the microSD memory card.
Open Settings from the Applications tab, then tap Privacy > Factory data reset; click Reset phone and then Erase everything to format your phone.
If your phone is not responding to screen input, you may need to reset your smartphone first (described above).