If your phone is working slowly due to its firmware, you will need to hard flash it by using any flash tool or box. There are some important things which every flash will need to collect before flashing any phone. Flashing process will take enough time to complete. You will need to still wait for several minutes if you have just started flashing of your phone. 
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- First of all download the firmware of your phone
- Install any flash tool or box, which you want to use as a flasher
- Take a backup of your data
- Install USB driver of your phone
Before flashing please don’t forget to take a backup of your data. Otherwise, you will lose it and the phone will be restored to its original settings.
You can safely restore your backup data to the phone after flashing. Now follow provided links below to get the latest firmware of your phone. If you are unable to download it or facing trouble during flashing, feel free to contact us.