A factory reset reverts the phone back to its original state — the state before you turned on the phone for the first time.
Make sure that you have back up all your important files before resetting your HTC Desire 626. Below are the files that will be removed after the reset performed.
> Your Google Account
> All accounts you've added in Settings > Accounts & sync and the data associated with these accounts
> Personal data that you've created or synced to the phone such as your profile, contacts, messages, email, calendar events, and more
> System and application data and settings
> Downloaded apps
Files such as your music, photos, videos, and documents will also be deleted if you select the Erase all data option.
How to perform the Factory Reset on HTC Desire 626
> Go to Settings, and then tap Backup & reset.
> Tap Reset phone.
> If you also want to delete media and other data on HTC Desire 626, select Erase all data.
> To delete media and other data on your storage card, tap Erase SD card.
> Tap OK to confirm.
How to perform the Hard Reset on HTC Desire 626 Using Buttons
Use this option if you can’t access the settings on your HTC Desire 626.
Important: The Fast boot option in Settings > Power must not be selected.
> Turn off your phone.
> Press and hold the VOLUME DOWN button, and then press and hold the POWER button.
> Wait for the screen with the three Android images to appear, and then release the POWER and VOLUME DOWN buttons.
> Press VOLUME DOWN to select FACTORY RESET, and then press the POWER button.