Experience with root (Magisk) and GSI (LineageOS) on Ulefone Armor X5 Pro [≈3MB pictures]

Warning: This is BY NO MEANS to be treated as a ready-to-use tutorial and therefore posted as blog entry (nevertheless all steps are listed at the bottom in short form). It is an experience report to the best of my knowledge. The description might contain fatal errors.
Modification involves the risk of data loss and may end with an unusable device without any possibility of recovery!
Anyone attempting such things does so at their own risk!
Now to the positive. The device is several years old and no longer under warranty... so get on with it! Do something with it, Sina, and finally learn how to use these things!
Bootloader unlock is remarkably simple. The standard command
takes effect immediately. After confirming with [Volume up] (or was it [Volume down]?), the user profile is deleted and from then on the smartphone starts with a 5-second delay and the crappy "Orange State" warning.
So far so good

Let’s get started:

The installation of the latest, stable Magisk - currently 26.4 - is trivial. The stock ROM for the MediaTek chipset already comes in individual partitions. Consequently, boot.img is easily available. Install Magisk App, select boot.img, patch it and
That was all. No disable verity, no flash vbmeta or whatever else you find when searching on automatically created pages. That's how easy it is to become root on this device. That's how it should be!
Nothing stands in the way of adding Busybox for a decent set of Unix utilities as a Magisk module - as well as a module for "systemless debloating". Goodbye, "Google Apps" garbage!

In principle, everything would be fine at this point. If it weren't for the problem with the lack of updates mentioned in the spoiler above. The July 2020 patch level is surely not the best and Android 10 has already been discontinued anyway.
So, if you're going to do it, do it properly:


Trying to find a "real" adjusted custom ROM for such an exotic low-cost model is... hopeless. The same goes for TWRP: nothing. What talented developer would sit down and do something like that? Well, luckily there are still the generic system images (GSI) for all devices that came at least with Android 8. However, skepticism as to whether something like this really works as intended is appropriate.
Quickly download a suitable image (A/B, arm64): lineage-20.0-20240112-UNOFFICIAL-arm64_bvN.img.xz and hammer a few lines into the terminal in a frenzy of success. Easy to find instructions say to leave the proprietary vendor partition untouched and flash the generic image to system.


Back to the search engine. What do you find after an exhausting search? Aha. Devices shipped with at least Android 10 have a complex nested "super" partition, which contains vendor, product and system as dynamic partitions (variable size). To hell!
Do you have to learn how to create a customized super.img with lpmake? No. You need a counterintuitive approach: You need to realize that fastboot is not fastboot. On newer [sic!] devices there are two different fastboot:
starts in fastbootd and within this system the "super" partition is opened. Deleting and flashing the individual components is possible.


You can make something out of devices that do not receive any official support if the bootloader can be unlocked.
The smartphone works for the most part - at least at first glance. Calls work. Mobile data connection too. Magisk 26.4 is running. Neobackup can restore apps+data. Playback of an audio drama via a Bluetooth speaker went well. Camera takes pictures. Flashlight okay. No excessive battery drain. Maybe even better than before. Time will show. With stock ROM it only lasted about two weeks for 100%→30%… PATHETIC.
WiFi is not working correctly: WPA2/WPA3 is selected under security on the Fritz!Box. Connection attempts from the Ulefone fail. Reducing the security options to WPA2 only leads to success. Assumption: Android 13 is trying to connect with WPA3 and the smartphone's hardware does not support it.

Overall, a big plus for the Ulefone Armor X5 Pro. LineageOS 20 will remain on my phone
All in all, a much cooler thing than showing off the latest 1000€ swank phone full of bloatware.

A few screenshots and photos from/of the device:

From Google-infested stock ROM to rooted device with Android 13/LineageOS 20:​

1. Backup personal data!!
2. Download and unpack the stock ROM from Ulefone with the PC. Also use the PC to download the desired GSI ROM (for A/B, arm64) - in my case LineageOS 20
   • Install Magisk app and patch boot.img from the stock ROM
   • Copy the patched file to the PC
3. Activate developer options, USB debugging on, authorize PC
   • Allow OEM unlock in the developer options
   • adb reboot bootloader
   • fastboot flashing unlock ((And then agree to DELETE ALL DATA)
4. Get root access
   • fastboot flash boot Magisk_patchedXZY.img → Rooting process finished if staying on stock ROM.
5. Flash GSI ROM
   • fastboot erase cache
   • fastboot erase userdata
   • fastboot reboot fastboot →[fastbootd starts]
   • fastboot erase system
   • fastboot flash system lineageXYZ.img
   • fastboot reboot

After a few minutes LineageOS 20 should be ready. USB debugging without the need for authorization is active. So it is open like a barn door. If everything went well, it should be switched off.