How to update Firefly Mobile GT-200S?
To update the Firefly Mobile GT-200S you need to install an alternate firmware (ROM).
If the device does not automatically update by itselves. You can use the new firmware for your smartphone.
You have to choose the firmware version and follow the instructions. If you have a trouble in update you can write about it in the comments below, we’ll help you.
Firefly Mobile GT-200S firmware:
You can install this backup via Chinese Miracle 2