[General Questions and Answers] Jon3s:
I am fighting with my A146P. I wanted to install a custom recovery tool, which badly failed. "Every" guide on the net i tried. The most success was with the custom twrp image / vbmeta file and flash in odin. i can start twrp like this and figured out how to mount data etc without error. But in the end it is never possible to go out of twrp ( flashing the rom, no start just back to twrp. Like there is no correct path to the os or so. So atm i have rooted via magisk tar flash of stock firmware. Working great so far. But i cant let go that i was not able to install twrp on the recovery. ... Please help me in this case.

i tried to read the patch for magisk and what could cause the error and the termination of installing magisk.

i cant install magisk in twrp not via adb sideload or direct - unknown image error after some installation steps.

i tried to flash the boot.img with twrp and then install magisk again, always the same error.

pull via adb was used to get the magisk_patched tar file on the pc.

Is there any way to get this working without an external sdcard ?

No problem with de/encryption.

I read about a/b partition.... My device was checked by treble info Result : GSI passinle : need image like arm64-ab.xz

But Seamless update not supported. I found a recovery partition and nothing else. The command to print partition gives me a blank output. Also fastboot commands like flash or flashable unlock dont work. i tried different cable, different driver and different usb ports.

Those infos are confusing, as a/b must be seamless supportable or not ?

Odin3_v3.14.4

twrp-3.7.0_12-1-a14xm.tar

using latest SDK toolkit with Android Debug Bridge version 1.0.41 and Version ADB/Fastboot 34.0.4-10411341

platform-tools>fastboot getvar all

(bootloader) serialno: R9xxxxxxxxxx

(bootloader) is-userspace: no

all: Done!!

Finished. Total time: 0.000s

fastboot boot droid.img

creating boot image...

creating boot image - 1318162432 bytes

Sending 'boot.img' (1287268 KB) FAILED (remote: 'unknown command')

fastboot: error: Command failed

platform-tools> fastboot flashing unlock ( oem does not work too )

FAILED (remote: 'unknown command')

fastboot: error: Command failed

platform-tools>fastboot boot twrp.img

Sending 'boot.img' (40960 KB) FAILED (remote: 'unknown command')

fastboot: error: Command faile

platform-tools>fastboot flash recovery twrp.img

Warning: skip copying recovery image avb footer (recovery partition size: 0, recovery image size: 41943040).

Sending 'recovery' (40960 KB) FAILED (remote: 'unknown command')

fastboot: error: Command failed

first i got some set var error outputs which i then have set to the locations according the guides.

ANDROID_HOME/platform-tools =...\Android\Sdk\platform-tools

Path = ...\Android\Sdk\

Bootloader unlocked - atm the option in dev option is not locked out, this changed after i first tried to boot something to the phone, not sure what about this. Before it was active but not clickable. First i thought the bootloader is locked again somehow..

I found information about fastbootd, but i could not do anything with it, just checkes the android dev guide for it but thats out of my understanding...

MTK Secure Boot enable is correct as this is not referring to the state of the bootloader right ?

In the end i would be happy to have a recovery system and a good custom rom/kernel with focus on performance. I wanted to figure it our my self but i have to give up. many many sleeples night. but i cant i tried anything i could find online. I my self have not really a clue about all thois stuff so i hope you have a moment to help me get my SM-A146P work.

If you could tell me what possibilities i have to install any custom os rom/kernel and in the best case what i can do with twrp or another custom recovery this would be perfet.

If someone have the solution or a hint, that would be much appreciated !