im sorry for asking this question, but i already tried all of methods to hard reset my lumia 800, pressing volume down, camera and power button,but didnt work at all,,is there any other methods to hard reset my lumia???
I think you are left with the ROM alternative from (e.g navifirm) and then load it to your phone. Do a few searches about it and then proceed, but be careful as you can brick your device and make sure you download the right ROM for your device