I tried several MediaTek devices and @Colors was right, you can fix bluetooth problem with phh settings, under bluetooth workaround you can choose mediatek.
I will test more but good stuff 
It would be helpful to know which models of MediaTak chipsets (SoC) are involved, because my experience shows that higher-value the SoC, the more differentiated the results with CustomGSI.
You are right, it’s Helio P65, Helio G88 and Dimensity 700.
I will test even more.
SoC: MediaTek Dimensity 700 MT6833
Stock Android 13 + 14 - Android Recovery
GSI 3.0-beta.3-a14-20250424-CUSTOM-arm64_bvN by @Colors
Non - 5G / 4G LTE, 2G; SMS; Mobile data
X This malfunction also occurs with other CustomGSIs, regardless of whether the GSI is based on LineageOS or pure AOSP code. The MediaTek chipsets and firmware are the problem.
@Xxpsilon is now /E/OL.
Hi colors, is the source of this GSI or any instructions on building this available? I’m looking into building a GSI for a "special’ device, namely the bigme hibreak pro which requires a few E-ink tweaks!
Hi, diedeboef!
If you browse above you will find the instructions.
Oh completely missed that one, you are a hero!
I’ve been following the tutorial and its been going well!
Some small tip
- in step one, when downloading all of the repo’s it is important that after you run the described command, you first remove the line locating github in the local_manifests/manifest.xml file. because the repo sync wont work without.
additionally, im experiencing 3 bugs;
namely that the square app overview button doesnt seem to work
and the app lounge isnt able to install apps