• Remove any cables from your phone.
  • Switch the power OFF !
  • Take out battery and taste it with your tongue. 
  • ( This is not a joke! Your experience will tell you, the status of your battery. That's it. )
  • Copy the dload folder including update.app to a formatted SD card.
  • Press and hold volume up and down keys, and then the power button.
  • When the boot screen appears, release the power button : but not the volume keys.(Vol+ & Vol-)
  • You can release them when you see the firmware upgrade interface. 
  • Leave the phone by itself.
  • The upgrade process may take up to three minutes.
  • Just sit back and wait.
  • That's all. Good luck.

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