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Why don't cell phones have BIOS?
(lemmy.eco.br)
This is a most excellent place for technology news and articles.
It has a snapdragon CPU so you'd have to try to find how to get it into EDL mode and potentially a cable for it. With my oneplus phone I rescued the other day I was able to use a regular cable, but that was also with their proprietary software.
https://en.wikipedia.org/wiki/Qualcomm_EDL_mode