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TESTED FIRMWARE
HANG ON LOGO DONE
Oppo_A1S_CPH1925_MT6765_11_A.38_201221.zip
EMMC REPAIR
DOWNLOADE FIRMWARE
To fix an Oppo A1S CPH1925 that is stuck on the logo screen, you can try the following steps:

Charge your device fully, and then try restarting it by pressing and holding the Power button for a few seconds.

If the device is still stuck on the logo screen, try performing a hard reset. To do this, turn off the device and then press and hold the Power button and Volume Down button simultaneously for a few seconds. This will boot the device into recovery mode.

In recovery mode, use the Volume Up and Volume Down buttons to navigate to the "Wipe data/factory reset" option, and then press the Power button to select it. Confirm the reset by selecting "Yes" and pressing the Power button again.

Once the reset is complete, use the Volume buttons to navigate to the "Reboot system now" option, and then press the Power button to restart the device.
Download the appropriate firmware package for your Oppo A1S CPH1925 from a reliable source.
Install the Oppo USB drivers on your computer.
Extract the firmware package on your computer using a compression tool like WinRAR or 7-Zip.
Open the flashing tool on your computer. You can use tools like Miracle Box or SP Flash Tool.
In the flashing tool, click on the "Scatter-loading" button and select the scatter file from the extracted firmware package.
Once the scatter file is loaded, click on the "Download" button to start the flashing process.
Turn off your Oppo A1S CPH1925 and connect it to your computer using a USB cable.
The flashing process will begin and it may take a few minutes to complete.
Once the flashing process is complete, you will see a "Download OK" message on the flashing tool.
Disconnect your Oppo A1S CPH1925 from the computer and reboot the device.

If these steps do not resolve the issue, you may need to flash the firmware on your Oppo A1S CPH1925 using the Miracle Box or other flashing tools. However, it is recommended to take a backup of your important data before proceeding with the flashing process, as it may erase all data on your device. Additionally, it is always recommended to seek the assistance of a professional technician if you are not familiar with the flashing process.