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My phone is OnePlus 5t.

In fastboot mode I flashed TWRP fastboot flash recovery twrp-3.5.2_9-0.img

and every time I try to enter recovery mode it just start the original recovery mode that came with the system.

But if i enter 'fastboot' and type: fastboot boot twrp-3.5.2_9-0.img the TWRP comes up.... How can I make it automatically TWRP? ty!

enter image description here

Edit: someone send me this: adb device doesn't listed on cmd {Lenovo K8 Plus}

And this was the problem:

Another common mistake after flashing TWRP you must not boot into android. Reboot straightforward into recovery right after flashing, otherwise your custom recovery will be replaced with stock recovery /system/recovery-from-boot.p

Joe
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    A lot of system ROMs automatically flash a built-in recovery ROM when you boot it. Therefore if you want to permanently stay at TWRP you have to identify where in your main ROM this happens and disable it. – Robert Apr 20 '21 at 07:04
  • How can I do it? I have no idea.... – Joe Apr 20 '21 at 08:23
  • usually TWRP will figure it out itself when you swipe to allow modifications – alecxs Apr 20 '21 at 09:27

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i think u need to flash 2 more files , called "force dm verification" and "decrypt" not sure that's the exact name but these basically get the job done

  • this can be useful for modifications. but will not solve the problem caused by recovery-from-boot.p – alecxs Apr 20 '21 at 09:31