To preface, the following information pertains to and is performed on our Galaxy A14 5G The device runs the MT6833 SoC, the Samsung MT6833 family are the following devices:
- Galaxy M13 5G
- Galaxy A13 5G
- Galaxy A22 5G
- Galaxy F42 5G
If you follow the steps below, I would still recommend verifying the location of the up_param partition. But overall, the up_param will be safe to flash to those devices.
Connect the device to your computer and open terminal or command prompt.
Enter an adb shell:
Access device shell with elevated priveleges
Using Magisk, accept "SuperUser Request"
List the block device partitions
$ a14xm:/ # ls -al /dev/block/by-name
Look for the entry similar to up_param -> /dev/block/sdxY. This is the partition we're interested in
This is our entry:
Backup the Original Partition
To copy out the original up_param partition, run:
dd if=/dev/block/sdc40 of=/sdcard/up_param.img
This will write a copy of the partition as a tar partition image named up_param.img in the root directory of our device Internal storage. Backup this file elsewhere if you mess with the image beyond repair.
The location is arbitrary, but move the file to your system. I would create a subdirectory in Downloads/
mkdir -p ~/Downloads/up_param && mv up_param.img ~/Downloads/up_param
Decompress and Edit the Images
Decompress the up_param.img file to reveal a list of images
user@ubuntu:~/Downloads/up$ tar xvf up_param.img
The archive contents are decompressed in the up_param/ directory
We want to edit the booting_warning.jpg and svb_orange.jpg
- Use any image editor of your choice to modify these images. I used GIMP to fill
booting_warning.jpgover the initial warning message
With GIMP Fill Tool: make sure to move the tolerance slider to maximum value. In order to completely fill the image black.
Since svb_orange.jpg is originally in 936x1800 aspect ratio, it doesn't match full screen resolution.
To fix the modified svb_orange.jpg from appearing "too small" upon boot, You can copy out the logo.jpg and rename and overwrite to svb_orange.jpg
Repack and Replace the Partition Image After editing, repack the modified images into back into a tar archive
user@ubuntu:~/Downloads/up_param$ tar -cvf up_param.tar *.jpg
Linux uses the mv command to rename, from up_param.tar to up_param.img
user@ubuntu:~/Downloads/up_param$ mv up_param.tar up_param.img
Place the modified up_param.img back into the /sdcard directory on your device. Where we first copied out the original up_param.img
Restore the Modified Image Enter back into an root adb shell
- Write the modified image back to the original partition
dd if=/sdcard/up_param.img of=/dev/block/sdc40
Reboot, and voila.