[Sony Xperia 10 Guides, News, & Discussion] 535iu:
Typing...

Hi, my current phone is the Sony Xperia 10 (model I4113). I have had several peculiar problems with this phone and there are things from other guides that have not worked for me.

My main problem has been with TWRP and the command:

fastboot boot twrp.img

At no point did that command work for me. Not even testing on various operating systems: W11, W10 and Linux.

So I had to find my own way.

My main idea was to combine the stock ROM (Android 9) with TWRP, but I didn't succeed. So I moved on to my next option: installing Lineage (17.1, A9) and TWRP. No success there either.

So that's my sad story.

Ok, I'm going to explain the interesting part now.

...

The truth is that I did manage to use TWRP with a special command. However, that command trashed the system boot partition, since that's where I installed TWRP (I couldn't get it to boot without installing it).

Booting TWRP with partition B, I installed Lineage. And then I installed copy-partitions.zip on partition A (booting it first). However, I eventually realised that this didn't work, as TWRP had loaded the system boot.

I also tried installing TWRP via the LIneage recovery, but the result was the same: the boot partition was trashed and only useful for TWRP. This meant that no system could boot. So it was obvious that I had to give up TWRP.

...

Well, here I had learned my lesson: I was not going to be able to stick with TWRP. So I did the following.

1. I did a clean install of the firmware with Emma.

2. I installed TWRP (despite the problem) with Linux, on partition A and partition B.

3. I started TWRP (Power + VOL-).

4. I activated partition B and installed Lineage (which will be installed on the free partition: partition A).

5. Restart the recovery (Power + VOL-).

6. Lineage recovery started, with partition A.

7. Installed Lineage from there (which I think would be installed on partition B).

8. Turned off the phone and force started the recovery.

9. Started the recovey, with partition B.

10. Installed Lineage (which I think would be installed on partition A).

11. Turned off the phone and force booted into recovery.

12. Started the recovey, with partition A.

12. Factory reset (Format Data).

13. Installed copy-partitions.zip

14. Rebooted to start the system. Until the system booted completely.

This way, I checked that everything went well. Now I could install the add-ons. I did the following:

15.I turned off the phone and forced recovery boot.

16. Recovery started, on partition A. Everything went fine.

17. Factory reset.

18. Install Magisk (must be in ZIP format). It will give a signature failure, but press Yes.

19. Install NikGApps (I read that Omni are recommended, but confirm that they are for the version of the system you have). It will give a signature failure, but press Yes.

20. Reboot the system.

Now we do the initial configuration again and wait for everything to load.

Install the Magisk APK. In my case, it is Magisk Delta. Once installed, I was asked to reboot. After rebooting, I got a Magisk error and had to select "Direct installation". It installed successfully and the phone rebooted. I thought for a moment that I was going to be screwed, but it rebooted correctly.

Now you can enjoy your phone.

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Special thanks to @Kestnix who has been helping me all the time for days.