How To Guide How to flash gsi on t220, t225 with Twrp - Samsung Galaxy Tab A7 Lite

first we need twrp :https://forum.xda-developers.com/t/...7-lite-sm-t220-sm-t225-sm-t227.4467157/page-4
flash Twrp with odin
adb :https://developer.android.com/studi...hBsz3t9Zv2XnXQoRfThoCbpUQAvD_BwE&gclsrc=aw.ds
when you boot into twrp without touch try rebooting with adb
adb devices (make sure the device is recognized)
adb reboot recovery
choose the gsi you want :https://magiskzip.com/gsi-list-phhusson/
Because internal storage and adb sideload are disabled we need 8Gb Sd card
vbmeta.img from google :https://dl.google.com/developers/android/qt/images/gsi/vbmeta.img
in this picture i flash magisk
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Thank @Zillion and @Skorpion96 for this Twrp build

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Ok first guide needs to be more detailed, second when touch don't work in recovery you can't reboot with adb, instead you can connect an otg mouse and reboot with reboot from twrp menu. Another thing is that after flashing gsi technically you can disable encryption, copy files like on twrp guide and format data.

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Don't flash gsi
since i bricked the device, if the device keeps booting up, press the volume down button while plugging in the computer and hold the volume up and down keys

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Power + Volumn down. = Forced Reboot
Volumn up + Volumn down + USB Then Volumn up = Download mode (ODin)
Use only Stock ROM...

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Difficul said:
Don't flash gsi
since i bricked the device, if the device keeps booting up, press the volume down button while plugging in the computer and hold the volume up and down keys
Click to expand...
Click to collapse
Obliviously you flashed wrong gsi, gsi as you may or may not know are for an architecture and for a precise slot so obviously if something is not compatible it won't boot

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tom.android said:
Power + Volumn down. = Forced Reboot
Volumn up + Volumn down + USB Then Volumn up = Download mode (ODin)
Use only Stock ROM...
Click to expand...
Click to collapse
You can use gsi flash via odin

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Skorpion96 said:
Obliviously you flashed wrong gsi, gsi as you may or may not know are for an architecture and for a precise slot so obviously if something is not compatible it won't boot
Click to expand...
Click to collapse
So the partition of the tab I should choose is a or ab
i choose ab

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Difficul said:
So the partition of the tab I should choose is a or ab
i choose ab
Click to expand...
Click to collapse
You can choose A, AB or B (our device is a-only though), it all depends on the filename, this can differ between GSIs. Just be careful with the architecture, choose arm64 not a64 or binder64. More about interpreting GSI file names by tapping in the following spoiler.
Spoiler
Some information you should know about knowing what type of gsi it is
<ARCH>_xyZ
<ARCH> can either be arm, a64 (arm32_binder64) or arm64
x can either be a or b
y can either be v, o, g or f
Z can be N or S
b = a/b
a = a-only
g = gapps
o = gapps-go
v = vanilla (no gapps included)
f = floss (free & open source apps instead gapps)
N = no superuser
S = superuser included
so in most common example "arm64_avN" is ARM64 A-only vanilla with no superuser

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nirogu325 said:
You can choose A, AB or B (our device is a-only though), it all depends on the filename, this can differ between GSIs. Just be careful with the architecture, choose arm64 not a64 or binder64. More about interpreting GSI file names by tapping in the following spoiler.
Spoiler
Some information you should know about knowing what type of gsi it is
<ARCH>_xyZ
<ARCH> can either be arm, a64 (arm32_binder64) or arm64
x can either be a or b
y can either be v, o, g or f
Z can be N or S
b = a/b
a = a-only
g = gapps
o = gapps-go
v = vanilla (no gapps included)
f = floss (free & open source apps instead gapps)
N = no superuser
S = superuser included
so in most common example "arm64_avN" is ARM64 A-only vanilla with no superuser
Click to expand...
Click to collapse
I flashed this and my device was bricked

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Difficul said:
I flashed this and my device was bricked
Click to expand...
Click to collapse
Note there are some ROMs that just won't work. CorvusOS did not work for me.

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nirogu325 said:
Note there are some ROMs that just won't work. CorvusOS did not work for me.
Click to expand...
Click to collapse
What is the best rom for mtk in your opinion?

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Difficul said:
What is the best rom for mtk in your opinion?
Click to expand...
Click to collapse
I'd say choose any GSI you want because they use almost the same amount of resources and for our tablet, more than half of the customization options don't work because they're designed for phones so in the end they all feel similar.

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nirogu325 said:
I'd say choose any GSI you want because they use almost the same amount of resources and for our tablet, more than half of the customization options don't work because they're designed for phones so in the end they all feel similar.
Click to expand...
Click to collapse
I need an ultimate custom rom like e/os

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Difficul said:
I need an ultimate custom rom like e/os
Click to expand...
Click to collapse
i use Pixel Experience on my

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Skorpion96 said:
i use Pixel Experience on my
Click to expand...
Click to collapse
e/os is more secure, it gives me a higher overclock frequency, the interface is like ios, because it's de-google, it's optimized

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What is the use of vbmeta.img file? Please tell me complete steps for flashing gsi and magisk. Thank you in advance.

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decentdude said:
What is the use of vbmeta.img file? Please tell me complete steps for flashing gsi and magisk. Thank you in advance.
Click to expand...
Click to collapse
erase data , system
You need flash vbmeta.img fisrt
Then flash gsi.img
flash magisk
reboot

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Difficul said:
erase data , system
You need flash vbmeta.img fisrt
Then flash gsi.img
flash magisk
reboot
Click to expand...
Click to collapse
Is flashing magisk necessary?

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DARK002s said:
Is flashing magisk necessary?
Click to expand...
Click to collapse
No

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Can you provide more detail? The "how to" guides for installing GSI are leaving out a lot of steps and info