There was this question here the solution to which was to boot into TWRP before booting android, so that TWRP isn't replaced by Android Recovery. I can press UP+Home+Power and go into recovery - I've not had an issue with that. But the trouble is that rather than showing TWRP it shows an android logo and it says it "updates the system" and then what comes up is Android Recovery instead of TWRP.

I'm using samsung's SM-g532g (galaxy j2 prime). It does not have an official TWRP apparently, so I'm trying the TWRP that this site suggested. I've tried it many ways: I've booted into recovery right after flashing TWRP, removed and replugged the battery and then booted into recovery, etc.

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    apparently TWRP is still replaced with stock recovery, or partition isn't covered by bootloader at all. you might flash some kernel fix to enable recovery from partition instead from ramdisk. see example extract_elf_ramdisk for Sony Xperia XZ1 Compact android.stackexchange.com/q/230682 – alecxs Jan 19 at 10:50
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    btw this is first samsung device with mediatek chipset i have ever seen, can you confirm it is not exynos or qualcomm? on mediatek devices you can use SP Flash Tool – alecxs Jan 19 at 10:56
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    SP Flash Tool is not safe, that's why the first thing you should do is full ROM dump and create your own scatter file based on current partition layout. for this i recommend 2nd Tool WwR MTK android.stackexchange.com/q/203283 android.stackexchange.com/q/220584 – alecxs Jan 19 at 15:14
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    sure, as for all modifications. but on ancient samsung devices this is already done by toggle OEM unlocking in developer options, afaik no extra unlocking step required (no vaultkeeper) – alecxs Jan 19 at 16:02
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    if SP Flash Tool is too complicated try mtk-su bootless root method (risky on locked bootloader) – alecxs Jan 19 at 16:07

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