How can i format o2 windows mobile driver - O2 Xda Stealth Smartphone

But my ph is not reset after applaying these steps

If you mean you want to hard reset your device, i.e. remove all the programs installed by the user, as well as all personal data stored there, first of all, make sure its battery is at least 50% charged. Then, press and hold both the 'Windows' and the 'OK' buttons (in your device's fascia), and at the same time, briefly press the reset pin (at the right side of your device) with the stylus pen.
Hope it works for you.
Best regards, Carlos