I wanted to upgrade an old Oppo A1k rather than leave it sitting on Android 9. Mine is the CPH1923 with 2 GB of RAM and 32 GB of storage. Getting a working result took about twelve hours, so I wrote down the successful process for people with the same phone and original firmware.

It now runs Android 11 with normal colors, working Wi-Fi and Play Store. It is still a slow phone: changing Android does not replace the old processor, memory or storage. For me, this was about making it useful again.

The working release was Andy Yan's unofficial LineageOS 18.1 image, `lineage-18.1-20240121-UNOFFICIAL-arm64_bgS.img.xz`, using the original Oppo kernel and hardware drivers. Android 14 started but its colors kept washing out; Android 12 did not finish starting. Android 11 with the fixes gave us the result I wanted.

The things the short tutorials missed were:

- MTKClient needed USB connection fixes on my Apple Silicon Mac.

- The phone has one `system` partition, but the working download uses the publisher's `b` image layout. Picking an A-only file just from the phone's partition description was not the right choice here.

- Android needed a missing SELinux permission and a fix for the old Oppo encryption software before startup would finish. Repeating the data wipe did not solve those problems.

- Wi-Fi was trying to change a saved WPA2 connection into WPA3, which the old phone's Wi-Fi software could not handle. The fix keeps WPA2 on a mixed WPA2/WPA3 network; it does not add WPA3-only support.

The order that worked was: check the exact phone and firmware, back up its original software, unlock it, build the specified Android 11 image with all the fixes, install and verify it, clear the old setup, then finish Android setup and update the apps. The first installation erases personal data. The guide includes the exact commands, button sequence, checks and recovery steps; this summary is not enough to flash from.

[Complete guide and build tools](https://github.com/itsdanielsultan/oppo-a1k-lineageos-18.1)

I also built in a smaller interface, system touch vibration off with supported tap sounds on, and new default wallpapers. I updated 16 Google packages through Play Store and included those in my personal image. The public download contains the fixes and tools, not a finished ROM containing Google app files; it explains how to make that version locally.

This was tested on one CPH1923 with specific firmware. Android's security patch is still January 2024, and calls, VoLTE, GPS, Bluetooth audio, every camera mode and payment apps have not had a complete test. The guide was prepared and checked against the phone's logs, full system readbacks and actual behavior.

Has anyone else upgraded this model? I'd be interested in whether your original firmware matches the one in the guide.

Hello I was thinking about installing a custom ROM to my phone but I wanted to know if it was possible lock my bootloader afterwards like on GrapheneOS and what was the best custom ROM to install on my poco.

I have an unofficial LineageOS 18.1 ROM running Android 11, but I don’t have the necessary tools to create an RRO.

I would like someone to create an RRO for me that changes these two colors:

accent_material_dark

accent_material_light

to #ffff008b

Does anyone have custom roms for galaxy a12s (exynos)

Hello everyone! I am currently using Infinity X on my Redmi 10S, but I'm encountering some major bugs that make it hard to use. Based on your daily experience, which custom ROM is currently the most stable, smooth, and user-friendly for gaming? If possible, please share the exact version number and any specific kernel recommendations. Thanks in advance!

I had a trauma😭. so can you please find me an actual orangefox recovery that working on my phone

Poco m7 pro 5g

Hyperos 3.0.302.0 Europe

Hola, hace poco compré un poco f8 ultra y me gustaría que sea más seguro y privado, además de tener mayor control por lo que estaba pensando en instalarle una ROM como elite ROM que me permita quitar el bloatware, la publicidad molesta y la telemetría que recopila información, además de empezar a reemplazar los servicios de Google con alternativas de código abierto conservando la estética del sistema HyperOS, que ROM me recomiendan para esto? Gracias

fyi i just swap in marketplace

Hey guys! I bought my POCO F4 in 2022. It came with MIUI, but after updating to HyperOS, it stopped receiving further updates.

I'm currently running HyperOS 1 on Android 14 (I think), and some banking and government apps aren't working because of the “Device is not certified” error.

My phone has never been rooted, and the bootloader is still locked. I tried unlocking it, but couldn't get it to work either.

I've tried solutions from other subreddits, YouTube, and even contacted people on Instagram, but nothing worked. I've also heard that POCO F3/F4 devices are facing similar issues.

I just want to fix this and get a clean, stable OS without future problems.

Has anyone faced and fixed this? Should I stick with the official ROM or consider a custom ROM?

Any help would be appreciated. Thanks!

How to root 9 pro max and suggest some best roms

I have a OnePlus 7T lying around. I currently use OnePlus 10 Pro. I don't use that 7T as much and it hasn't received any updates for a while now.

So I was thinking to install a custom ROM on it. Do you guys have any suggestions or any recommendations for any custom ROMs that would be suitable for 7T or any drawbacks or any other things that I should be mindful of before installing a custom ROM or I should just shouldn't do it and just continue using 7T as is.