Oneplus 3T Bootloader

kingstreet911

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Aug 9, 2019
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I have a oneplus 3t. recently got the pie upgrade, and since then, the phone started behaving strangely. calls getting mute on their own, loudspeaker coming on during calls on its own, lag in a lot of apps, and so many more such issues.

there were absolutely no issues in oreo, so I looked up online and decided to go back to oreo. after reading a lot about it, i unlocked my bootloader, and tried to flash the oneplus oreo installation package, but what happened was, my phone got wiped clean, and pie was installed again, with my bootloader open.

thankfully, I had a backup of everything, so i was able to get back the things. But then, now whenever I'm restarting or switching on my phone, there's a message saying, your bootloader is open, and your phone cannot be trusted. Also, google and some more apps have almost frozen. Play store is not opening, i'm not able to add new google accounts, uber doesn't work, gmail has stopped, banking apps don't work, and so forth.

I want to go back to normal, when things weren't so jumbled. Perhaps Pie would be okay, or if I could go back to Oreo, that would be fantastic.

I am a complete novice when it comes to things like rooting, bootloader, TWRP, etc. Been reading about these but haven't really understood what they are. So please respond in layman's language. Thanks!
 
Last edited:

Didgeridoohan

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May 31, 2012
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Apps misbehaving might be caused by the problems you experienced, or possibly by restoring the backup (if the backup read from Oreo, if you restored data for system apps, etc). Whenever I experience issues as described I do a full wipe and start clean...

Banking apps are likely not working because of the unlocked bootloader (they see it as your device not being secure). Solution would be to lock it again, or install Magisk to hide the bootloader state. Resources on that:
https://topjohnwu.github.io/Magisk/
https://www.didgeridoohan.com/magisk

The message at boot, about the bootloader being unlocked, is perfectly normal and can be ignored.

Personally I've abandoned OxygenOS, since I don't really like how it has evolved. There are many good custom ROMs available to choose from instead:
https://forum.xda-developers.com/oneplus-3t/how-to/info-list-oreo-roms-kernels-available-3-t3688139
 
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