Oneplus 6 phone not starting - OnePlus 6 Questions & Answers

Hey guys, hoping someone with more knowledge then me can help me out here. I tried to install a custom from and may have bricked my phone as at the moment when it starts it just goes to a menu screen which has some options on it like wipe data and cache, advanced and exit. I can reboot to fastboot but cant go into recovery anymore. So this is what I did:
I did the adb OEM unlock
installed TWRP
then downgraded to oxygen 10.3.11 with the stock rom
then decided to upgrade to havoc android 11 and installed the from but there were too many issues
so I decided to go back to my oxygen rom. went into twrp reset the device and it went into a boot loop
At this point I could go into recovery so I mounted a USB drive and flashed the stock Oxyegn OS 10.3.11 again
Now I cant go into recovery anymore and the phone does not start up other than into the menu mentioned above.
Can I get some advice please on the steps I need to do to get my phone working again
Thanks
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Try 9.0.9 rom instead. Its a transition rom to 10.

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After reflash to stock - OPO turns on but displays boot logo

Hi there
Today I went from a working phone to a not working one. It all started when i wanted to do a factory reset.
I was on Franko r20 and on the second latest cynogen verison (can't remember the number). Since i wanted to flash the latest update i put the stock kernel on my phone and flashed it in
CWM directly on my phone. After that the phone didn't boot into the system. It just shows the boot icon.
Then used a guide to reflash every single OS component via fastboot . Still the same. No boot into system. Also cyanogen mod recovery couldnt find a data partition. AFter that i flashed TWRP. But like before TWRP also can't find /sdcard. It won't let me mount *data"
I also did a full factory wipe.
However when I reboot the phone I noticed that after a while the capacitive buttons light up and the phone makes key sounds when I tap the screen and lock sounds when I push the off button. It seems the phone is booted but I still get the regular OPO boot image on my screen.
Can anyone help me with this matter?
EDIT: This is how my TWRP console looks after trying to do a factory reset / wipe:
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[Q] ASUS TF300T: Boot loop caused by turn off

Hello everyone, I first apologize for my bad English, still working on it. After a couple hours I managed to install on my ASUS TF300T this custom ROM: KatKiss ROM Lollipop 5.1.0 Release 1. Everything was fine, expect for some Google Apps that don't work. Reading the Forum I got that one solution could be a new installation of the ROM and GApps. So I entered the TWRP Recovery and started the Wipe Data. And here came my stupidity. Since the process seemed to be blocked, I tried to turn off the Tablet. Obviously what I got wasn't any good. Now my Tablet keeps looping on Asus screen logo and TWRP Recovery home page. I can reach the screen with "RCK, Android, Wipe Data" but can't do anything. If I choose Wipe Data I get this:
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ADB on my Windows 8.1 PC can't recognize the device, so I'm in darkness about what to do. Is my Tablen gone forever, or are there any possible solutions?
Thank you in advance to everyone.
EDIT:
I have access to the device through Fastboot.
EDIT 2:
Probably I solved the issue, I used Fastboot to Flash again the Recovery.

Softbricked MT7-L10

So...
I did it. I wanted to help a friend with his Huawei Mate 7. It was the chinese version and he wanted a EU rom. Job as done, I said. This isn't the last time I swered that I won't tuch a chinese phone. I hate them.
What I did:
Unlocked the bootloader
Installed twrp 3.0.2
flashed the latest supersu
stucked at huawei logo!
I tied to flash different oficial version with the sdcard method but nothing worked. I tried to flash a twrp backup but nothing. Any ideas?
here is a screen before brick
https://drive.google.com/file/d/0B2vkg1nEXylkM1hGd0w5cGllNFBUMmg3RkVDUjBhUUdrWnFN/view
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somebody??
I made it worse. I use the post here http://forum.xda-developers.com/showpost.php?p=57531277&postcount=79 and because when I tried to flash fastboot it said command not allowed, I use the dd command in twrp and flased it. But now I have a black screen and vibrate.
If you can get into fastboot, or TWRP, have it running TWRP 3.0.2.0 again and flash a correct ROM for the TWRP version.
As long as you have a recovery it should be repairable.
If you can get it on Marshmallow, use this SuperSU, but make sure you look in the recovery options and mount partitions writeable.
mega:///#!0wITxJLR!S2iIVNjveSDMdne5QMNqd6so41vbTEK9tSJXJkO JJnw
No need for root until on the ROM you want to run.
Dead black screen

ADB Sideload not working for me

Despite all the good posts on here I have been unable to get my phone out of a boot loop, and am now quite desperate for help please!
If anyone can point me in the direction of a rom or kernel that will definitively work on my phone I will be eternally grateful
It was ok until I decided to unlock bootloader and root it.
Unlock bootloader went well, as did flashing TWRP and also CWM – I have a suspicion that it was rooting with OneClickRoot caused the problem.
After over a day of failure I discovered how to do ADB Sideload at this thread: I used CM11 I got from this thread: and also tried a Stock one from here:
sadly nothing worked, and I'm now afraid of filling my phone storage with large files. I have added some screen shots of my failed attempts with TWRP & CWM
they both fail, and TWRP does warn me not to reboot as I have no OS installed, but I had to keep on trying.
Another weird thing is that I cannot always reboot to recovery from the Hboot screen and have to re-flash a recovery image each time.
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SOLVED
no need to reply now folks, I got the job done ... see here

No Play-Protect Certification despite complete OOS reinstall

So I wasnt able to use GPay anymore when I rooted my device a month or two ago. Understandable.
To fix that, I've tried unrooting: didnt work. Now I reinstalled OOS entirely, wiped the whole device first, and it still doesnt work.
Do I need to lock the bootloader again or what are the criteria to get the certification?
Here some screenshots
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Wipe all is different with erase all, if you really want to wipe all use toolallinone firmware recovery flash and select wipe all and reboot options. Gpay probly sees the root files or magisk manager somewhere still
I don't really think that that was the case. I wiped everything in TWRP and then formatted the data as well.
In case someone else is facing this problem, this is what I did:
Boot into fastboot and re-lock the bootloader.
Code:
fastboot oem lock
I was then only able to boot into fastboot, and since the bootloader is locked, you can't boot into TWRP etc.
You then turn off the device and use MSM Tool to re-install OOS.

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