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
Use 'su' for Magisk or 'kp' for KernelPatch/APatch
If Using Magisk, accept "SuperUser Request"
List the block device partitions
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
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 device 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
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
After testing I can verify that it's safe to completely remove booting_warning.jpg, without affecting the startup process and splash logos from booting
Since svb_orange.jpg is originally in 936x1800 aspect ratio, it doesn't match full screen resolution.
To fix the svb_orange.jpg from appearing "too small" upon boot, instead of having to modify the image itself you can just copy out the logo.jpg to rename and overwrite that to svb_orange.jpg
Repack and Replace the Partition Image After editing, repack the modified images into back into a tar archive
tar -cvf up_param.tar *.jpg Linux uses the mv command to rename, from up_param.tar to up_param.img
mv up_param.tar up_param.imgPlace 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/by-name/up_param
Reboot, and voila.