Solved: How to hard reset O2 XDA Flame: Press and hold the Wireless Manager key and the Camera & Video key at the same time, and then...

Find out how to hard reset O2 XDA II: holding the power key, and simultaneously pressing...

Solved: How to hard reset O2 XDA IIi: Press and hold the Power button, and then use your...

Solved: How to hard reset O2 XDA IIs: Press and hold the power button, and then...

Find out how to hard reset O2 XDA II Mini: Press and hold the power button, and then use the...

Solved: how to hard reset O2 XDA Mini S: Press and hold “Comm Manager” and “Voice Command” buttons at the same time, then...

Solved: How to hard reset O2 XDA Neo: Press and hold the CAMERA and COMM MANAGER buttons, and at the...

Solved: How to hard reset O2 XDA Orbit: Press and hold the Left SOFT KEY and the Right SOFT KEY, and...

Solved: How to hard reset O2 XDA Orbit 2: Press and hold the GPS/MESSAGING and INTERNET EXPLORER buttons, and...

Solved: How to hard reset O2 XDA Orion: Power off phone. Press both LEFT and RIGHT SOFT keys, then press...

Solved: How to hard reset O2 XDA Stellar: Press and hold the left SOFT KEY and the right SOFT KEY, and at the same time, use...

Solved: How to hard reset O2 XDA Terra : Turn off the phone. At the same time, press & hold the O2 XDA Terra  Hard reset Soft resetleft/right...

Solved: How to hard reset O2 XDA Trion: Press and hold the Left SOFT KEY and the Right SOFT KEY, and...

Solved: How to hard reset O2 XDA Zinc: For Hard Reset, press the navigation key UP and press the...

Solved: how to hard reset O2 Xphone: press and hold the power key and the...

Solved: How to hard reset O2 Xphone II: Press and hold both the soft keys, then press POWER ON for 1 sec, then...

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.