Sorry, I didn't know where to post this, but okay; I've installed an Oxygen OS update two days ago and I've had my phone rooted, ever since my phone has been bricked, whenever I enter the bootloader my device isn't detected anymore by my laptop therefore I can't re-flash TWRP and now I'm completely stuck and don't know what to do, any help please?
You're best bet would be to download the full OOS OTA and then ADB Sideload the OTA.
You should find all the files you need on*
http://downloads.oneplus.net/
First, you download the full OOS ROM and the stock recovery for Nougat.
Then you flash the stock recovery (fastboot flash recovery <file name>).
Then you boot into recovery and select "install from USB" to get into sideload mode.
And finally you sideload the latest OOS (ADB Sideload <filename>).
It will take some time, but your phone should work after it.
FYI, keep in mind that you'll have to manually flash updates when using a custom recovery
Hope this does the trick for ya!
Good luck and happy flashing!
Sent from my SM-G955U using
XDA-Developers Legacy app