Top tip: there’s always a way to get to fastboot
Never lose hope, find the flashing tools and modes for your vendor and attempt to flash a recovery onto it. Somewhere out there (probably XDA) this information exists on the exact timings and button configuration needed to open that tiny flashing window where you can restore fastboot.
You might need to open the case and search for pins surrounding a chip with a TTL device (search for pinouts of your chip), but I guarantee you that the phone is always recoverable
I tried everything for my Poco F1 in 2023, some Qualcomm tools, trying to go into EDL mode, using some weird firehose files with the MI flash tool. I read every fucking XDA thread. I even brought that phone to a shady repair service station near me, nothing worked.
The only option I did not use were some sus af indian Telegram channels that sold that service for 20 bucks.
Don’t tell me the phone is always recoverable, because sometimes it is fucking not.
I’ve been exactly where you are, and can only say that despite it being maddeningly frustrating there is still always a way. It might require melting off a chip and soldering a replacement one on (with significant loss of data)
https://xdaforums.com/t/poco-f1-bricked.3968436/#post-80252328
You tried removing the battery panel and connecting the two test points to force EDL mode?
You’re well into Ship of Theseus territory once you’re replacing major chips. You’ve not really recovered the phone, you’ve just replaced big chunk of it so it’s not entirely the same phone anymore, just with extra hassle because you’ve not replaced the main board as a whole.
The Chip of Theseus.
Send me the phone. There is always a way to unbrick it. Source: trust me bro.
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