TWRP FOR TECNO KA7O SPARK 2

[Sunday Peter]

I tried porting twrp for my tecno spark 2 using hovatek twrp porter 1.4 gui , but phone just hangs on logo with " your devic cant be trusted 'e rror and boots back  to homscreen

[X3non]

I tried porting twrp for my tecno spark 2 using hovatek twrp porter 1.4 gui , but phone just hangs on logo with " your devic cant be trusted 'e rror and boots back  to homscreen

is the device rooted with magisk and without preserving avb?
did you use stock recovery.img for your exact build number?
did you try selecting other oreo options in the twrp porting tool?

[Sunday Peter]

Yes I patched the boot img file (gotten from hovatek database) with magisk and flashed via adb , and I'm rooted with magisk...I want to backup my phone and flash a custom room, but without a custom recovery ,it's a dead end. 
    I only used the 8.1 option in the porting tool because that's my Android version...it tried other port methods , I think they boot into twrp but with a black screen, but when I tap where the navigation buttons are , I feel the vibrations but nothing is displayed

[Sunday Peter]

  400100500805_24243.jpg (Size: 45.32 KB / Downloads: 4)  I just tried using the 8.0 Oreo option , when I rebooted to recovery , my phone hung on tecno logo and rebooted to home screen...I'm really disappointed, what should I do?

[Sunday Peter]

  Screenshot_20200912-105308.png (Size: 77.69 KB / Downloads: 3) I'm rooted

[X3non]

Yes I patched the boot img file (gotten from hovatek database) with magisk and flashed via adb , and I'm rooted with magisk...I want to backup my phone and flash a custom room, but without a custom recovery ,it's a dead end. 
...

this is a misconception i believe. you could backup esp with the device having root access you could also flash gsi roms using fastboot if the bootloader of the device is unlocked

 I just tried using the 8.0 Oreo option , ...

there's still the last 8.1g you haven't tried that yet

[Sunday Peter]

But my phone isn't the go edition , its just Oreo 8.1

[Sunday Peter]

Okay I'll take the fastboot route to flash gsi.....but it would be possible to flash Gapps via fastboot? 
Beside someone should port twrp or cwm for me ,please?

[X3non]

But my phone isn't the go edition , its just Oreo 8.1

you should read the important notice section on the mtk twrp porter tool thread. not sure how you missed it anyways