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TESTED FIRMWARE
HANG ON LOGO DONE
RESTART PROBLEM FIX
BOOTLOOP FIX
TESTED FIRMWARE
To flash the Infinix A9900, you will need to download the appropriate firmware for the device and use a tool such as SP Flash Tool to flash the firmware. The process of flashing a device involves completely erasing the current firmware and replacing it with a new one.  Before attempting to flash the device, it is important to ensure that the battery is fully charged and that you have backed up any important data on the device. Flashing the device may also void the warranty, so it is recommended to proceed with caution.  Here are the general steps to flash the A9900:  Download the firmware file, SP Flash Tool and the USB drivers for the device Install the USB drivers on your computer Extract the firmware file and SP Flash Tool to a folder on your computer Open SP Flash Tool and load the firmware file Connect the device to the computer using the USB cable Click on the download button in SP Flash Tool to start the flashing process Wait for the process to complete, and then disconnect the device from the computer. It's important to be careful when you're flashing your device as any mistake can damage your device permanently.  If you are experiencing issues with the device, flashing it may or may not fix the problem. It is best to consult the Infinix customer service for further advice.