[Samsung Galaxy A54 5G] LidelnFR:
Thank you kindly for this! I am quite a noob so I don't want to reflash the ROM all the time either ^^

Not sure about these adb commands, but I might have a look if I have time (this is my gf's phone, I don't want to bother her all the time)

Btw, for the installation, I had to do these steps (most are identical, but some are slightly different or more specific):

### Preparation steps:

"Called" *#1234# to get CSC and other information

I used SamMobile (premium sub to get the file quickly because I was in a hurry -- this is not a promo, I have zero link with them whatsoever)

Went to this thread to get Odin 3.14.1 3B PatcheD (not sure it changed anything)

Did the steps to activate developer mode, USB debugging, OEM unlocking (it did not wipe anything for me)

Turned the phone off

Turned it on again using VOL+ and VOL- at the same time (had to try again because it didn't work the first time)

Another option is to use ADB: adb reboot recovery (first you have to list devices, and if need be authorize (from the phone) ADB to access it)

In the blue screen, written at the center, are the options you can "press" for (not easy to see at first)

So, LONG (!!) press VOL+ to ask to unlock bootloader

SHORT press VOL+ to confirm unlocking the booloader (which will wipe data)

Reboot phone

### Firmware/flashing steps:

On the PC, unzip the Samsung firmware

Put (only) the "AP" file into the phone (e.g. "Downloads" directory) (I had first to remove the trailing ".md5" from the filename to only keep ".tar", not sure it is mandatory but I didn't want to lose 12 minutes of copy for nothing)

Install Magisk on the phone (ONLY from their GitHub : topjohnwu) (you have to do it AFTER the bootloader is unlocked, if I understood things properly)

Using Magisk, click the first "install" button at the top (which will actually patch an AP file), choose the AP.tar file from your "downloads" folder (for example)

When done, copy the newly generated file (magisk_patched-26100_{UID}.tar) to the computer (I first had to unplug USB and replug, because it would not refresh the folder properly, at least on Windows 10)

The file was already in .tar extension (at least for me) so I didn't have to compress it again

Reboot the phone in recovery or "download mode" (using the same steps as earlier)

Launch Odin, plug the phone, and flash the Magisk-patched AP file (only this file) (leave the options to their default)

It should reboot the phone when it's done

### Magisk-related steps:

Install Magisk again (it should (??) be wiped iirc), it will ask you to reboot after some changes it automatically made

Reboot

Relaunch Magisk, go to options, activate Zygisk: it will install a new module

Reboot

Go to Magisk, enable systemless host file (or something like that) so that ad blockers (e.g. AdAway) can work properly

Reboot

Go to Magisk again and enable "hide magisk" from the options, choose a custom name

Reboot one last time (not sure you have to reboot for each Magisk step, it's just to be sure)

Again, most steps are identical, but other change slightly or are more precise, because honestly I was kinda lost at first :)

Thank you again for the tutorial!

For the carrier services, I tried to "reset network" but it didn't do anything.