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.!
Dell AERO hard reset
Resetting the Aero Smartphone You can reset your smartphone to the factory default settings.
Master Clear DELL AERO
Select this option to reset all user settings to the factory default settings and delete all data stored on your smartphone, such as calendar events, tasks, and contacts, including contents that you have downloaded, such as applications, wallpapers, and ringtones. 1 In the Settings menu, tap Master clear & reset > Master clear. 2 Enter the master clear password. The default password is “1234”. 3 Tap OK to reset the smartphone.
Master reset DELL AERO
Select this option to reset all user settings to the factory default settings. However, all data stored on your smartphone, such as Contacts, are not deleted. 1 In the Settings menu, tap Master clear & reset > Master reset. 2 Enter the master reset password. The default password is “1234”. 3 Tap OK to reset the smartphone.
To Change Factory Password In the Settings menu, tap Security > Change factory password to change the factory password. Restore Factory Password In the Settings menu, tap Security > Restore factory password to restore the factory password.