Huawei Ascend P6 hard reset
Using the keys

Turn off your Huawei Ascend P6.
Press and hold VOLUME DOWN + POWER to enter recovery mode.
Select the wipe data / factory reset with volume key. Press power to confirm.
Select Yes -- Delete all data using the volume key and power to confirm.
Back up all of your important data on your phone before you hard reset your Huawei P6 Android phone.
HUAWEI Ascend P6 hard reset

Restoring factory settings from the menu
Restoring your phone to its factory settings erases all your personal data from the phone,
including your email accounts, system and application settings, and installed applications.

Back up important data on your phone before you restore factory settings.

1. On the home screen, touch settings icon then the All tab.
2. Under PERSONAL, touch Backup & reset.
3. Touch Factory data reset > Reset phone > Reset phone.
The phone will restore its factory settings and restart.
reset Huawei Ascend P6

How do I restart my phone?
Press and hold POWER button, and touch Reboot > OK to restart your phone.

Huawei Ascend P6 safe mode

To enter safe mode, when the startup animation disappears, press the volume down key until Safe mode is displayed in the lower left corner of the screen.
To EXIT from safe mode. Restart your P6 Android phone.

Huawei P6-U06

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.