Download the appropriate firmware for your device from the links below Transfer the firmware file you download into your miroSD card Rename the firmware file to 0PHCIMG Now insert the microSD card into your phone and turn it off. If its in bootloap, press and hold power button and volume up button together to reboot the phone. As soon as the phone turns off press and hold volume down button to enter boot loader or if you could turn off your phone, put the phone in bootloader mode by pressing and holding power button + volume down button together for few seconds. You should see a screen like this Your phone should now start reading the firmware in your MicroSD card After a while you will get a message asking whether you want to update your phone. Press Volume Up key to confirm Your phone might restart once and continue with the update. Please wait patiently for the entire process to complete. Please make sure you have enough charge on the phone and I suggest you keep the charger plugged in. The whole procedure might take about 20 to 30 minutes to complete Once the procedure is complete , it will ask you to press the power button to reboot the phone.