[Guide] Installing Updated GSI

[Khushtaur3123]

So, I was testing various and came across the guide for installing LineageOS17 GSI in the guides section. The way mentioned seems to be working

Procedure-
Install TWRP with latest security patches according to this guide https://forum.xda-developers.com/t/updated-september-2022-how-to-root-a7-2018.4488289/
Now, download Latest LineageOS19.1 vndklite-secure GSI.
Make sure to have backup of your internal storage, it might need to be wiped.
Install this GSI and right after that install Quantum Kernel 2.5 GSI version(for mtp) (check in attachments, it has Magisk 25.2 instead of 20.4 as mentioned in verbose) and then Magisk. After boot, check if MTP works in system, if it reboots, force reboot to TWRP and format Data and then reboot. That should fix it.
Without the kernel, seems to be stuck at logo.
No critcial bugs I have seen till now.

PS: always maintain a backup, I am not responsble if something goes wrong, like data loss.

Now, haven't tested it, but seems to me that any version other than vndklite-secure will have the 'camera in use' problem. So, try and let me know if that's the case.
Note - TWRP used is from a telegram group, which I couldn't share without the permission of owner. Search for it and you'll find it in A7 2018 telegram support group. TWRP version is 3.6.2.
Dmverity-disabler is to be flashed according to how to root guide only.
Tested on SM-A750F/DS (INS).

The reason why GSIs later than android 11 have a lockscreen bug is due to a vendor issue, in which Android 10
vendor of A7 2018 is not compatible with these GSI's. Apart from some Android 10 GSIs (like Havoc), lockscreen and everything works on these.

Abridged from https://forum.xda-developers.com/t/sm-a750fn-ds-unofficial-lineageos-17-1-gsi.4195065/

The img file for TWRP 3.6.2 is https://sourceforge.net/projects/batuhan-s-builds/files/TWRP/a7y18lte/recovery.img/download
To flash it as tar, use 7zip or any alternative to arcive as tar with default options, just make sure the image file remains as recovery.img, because it is present in this form on the phone partition. Tar can have any file name.
Source Telegram group for TWRP img file is @Exynos7885Updates
No sources have been specified by the developer.

For Indian SM-A750F, BL FILE IS INCLUDED

 

[Khushtaur3123]

Note: For Camera in use error, always try to use vndklite versions of GSI, they have specific patch to work with some specific types of vendors. Currently looking for lockscreen fix, most probably, it is also a vendor related problem.
All of these are android 12 or 13 ones.
Possibility of usage:

Works Complete with magisk (including working Lockscreen): FLOS19.1(https://github.com/ChonDoit/treble_flos_patches/releases) [use (VNDK)lite secure ones, stability check needed]

no lockscreen : AncientOS S,ProtonAOSP 12.4.1, ProjectBlaze12.1, LineageOS19.1, LineageOS 20.0 TD-based VNDKLite(no bluetooth), pHH A12.1 GSI (secure), OctaviOS(vndklite), Evolution X 13 vndklite (no bluetooth), Miku UI 13 (no bluetooth), Pixel Experience Plus 13 (VNDK)lite, (no bluetooth),

with 'camera in use': ArrowOS 12.1, CherishOS, DotOS, Pixel Extended 13, Pixel OS 13

Don't boot at all: CorvusOS, BlissOS, Crdroid, ProjectAwaken 415, DerpFest A13


Android 13 GSI's have a problem with bluetooth that allow connection but no audio to go to headset.
Downloads links: https://github.com/phhusson/treble_experimentations/wiki/Generic-System-Image-(GSI)-List

 

[Hungw]

where can you get twrp 3.6.2 for a750?

 

[blazzer12]

1. I have the latest stock firmware. Do I have to downgrade?
2. Did your phone has the latest firmware when you installed GSI ROM? Did you downgrade the firmware?
3. Also are banking apps like GPay work on GSI ROMS?

 

[Khushtaur3123]

1. I have the latest stock firmware. Do I have to downgrade?
2. Did your phone has the latest firmware when you installed GSI ROM? Did you downgrade the firmware?
3. Also are banking apps like GPay work on GSI ROMS?

No you don’t have to downgrade, just use the older 2020 Update BL file.


You can use UPI if you can securize the gsi and follow the steps of fixing safetynet. Search them

 

[blazzer12]

Thank you for the response.

Can you update the BL file file from 2020?

 

[Khushtaur3123]

Thank you for the response.

Can you update the BL file file from 2020?

No, updating with later BL's can cause issue with custom recoveries.

 

[VorzaCu]

Does anyone have issues with mobile hotspot in GSIs. In OneUI roms, mobile hotspot works normally, but on GSIs, it does turn on and discoverable, but without internet access. USB tethering works fine on all roms though.
My phone is SM-A750GN

 

[Khushtaur3123]

Does anyone have issues with mobile hotspot in GSIs. In OneUI roms, mobile hotspot works normally, but on GSIs, it does turn on and discoverable, but without internet access. USB tethering works fine on all roms though.
My phone is SM-A750GN

My 2.4Ghz hotspot work fine. SM-A750F/DS INS

 

[hydroxyz]

Do sms and calls work properly in FLOS 19.1?