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OPPO A53 TESTED FIRMWARE
HANG ON LOGO DONE
GOOGLEPLAY FIX
RESTART FIX
FILE NAME
Oppo_A53_EX_11_A.11_160627
A firmware file for the Oppo A53

A tool to flash the firmware file, such as the Oppo Download Tool.

Once you have those, you can follow these general steps to flash your Oppo A53:

Download and install the Oppo Download Tool on your computer.

Download the firmware file for your Oppo A53 and extract the files.

Turn off your Oppo A53 and then connect it to your computer using the USB cable.

Open the Oppo Download Tool on your computer and follow the instructions to flash the firmware file to your device.

Please note that it's very important that you download the firmware specific for your model, as flashing a firmware meant for another model can cause serious damage to the device.
Additionally, it's highly recommended to follow the official guidance from Oppo Support, as the steps and tools may change depending on the firmware version. Also, Flashing firmware will void the device's warranty, so it is not recommended unless you are having a critical issue