ZTE Grand S Flex hard reset

If your phone crashes, reboots, freeze, or cannot be powered on try to reset it to factory state.
All data will be lost!

You can reset your ZTE Grand S Flex device's password: Turn off your phone, then turn it on. Select emergency dial. Input *983*987# in emergency dial-up pad. It will restore factory settings and your personal data will be erased.
or
Reset Your Grand S Flex Andorid Phone from menu
The Factory data reset option erases all data on your phone and restores it to original factory settings. The data removed from the phone includes your Google Account, all system and app data and settings, and all downloaded apps.

1. Touch HOME > APPS > Settings > Backup & reset > Factory data reset.
2. Touch Reset phone.
If you want to remove all data saved to an installed microSD card, tick the Erase SD card check box before touching Reset phone.
3. Touch Erase everything and then follow the prompts to confirm the reset
To reset the ZTE Grand S Flex device from time to time for optimum performance, power off the device and remove the battery. Reinsert it and turn on your Andorid phone.
zte grand s flex hard reset
Factory data reset: Reset your phone to factory default settings. All your personal data from the phone’s internal storage will be erased. You can also erase the data on the memory card during the process.
The only way to revert to an unencrypted phone is to perform a factory data reset, which erases all your data.

If you forget your Andorid unlock pattern you set, try five times any pattern and touch Forgot pattern? to sign in to the Google Account you have added on the phone and reset the screen lock. Note: You need an active Internet connection.
If you cannot get into your phone you can also upgrade the phone software to reset the unlock pattern, remove the password or the security PIN.

There are several ways to upgrade your phone software:
1. Use the online upgrade tool for mobile terminal products.
2. Use the one-press upgrade package offered by your mobile service provider.
3. Use the upgrade package on your SD card.

General advice: Before you buy a new cell phone or new tablet, please try the following procedure to repair your device in a software way. First charge your battery, backup your important data if possible and in most cases take out SIM and SD card before doing 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.! Please also note, that a hard reset operation will not unlock your mobile phone's SIM lock or network lock, but it will remove the unlock pattern, remove the user password or PIN password (NOT the SIM card's 4 digit PIN code). Also note that the firmware version will not be affected in any way, it will not be downgraded, it will remain the same you are using and if you have rooted your device, root privileges remain also unaffected.