Which toolkit are you talking about? The only tool I found in this thread was the recovery tool in OP which I tried to use as mentioned in my first post.
Well, not me to thank. Thank the op who came up with the toolkit, I just corrected it slightly.
I found the answer! It is because of new security feature in 5.1.1
More info- https://nakedsecurity.sophos.com/20...p-5-1-brings-promised-anti-theft-kill-switch/
So any time when you have pattern or any lock then after a reset the bootloader will be locked! Same is the case if you revert back from CM12.1 to oxygen OS !!
Happened to me, read here- https://forums.oneplus.net/threads/stuck-in-registration-loop.351187/#post-12816700
I tried it thrice again to confirm! can you do that too ?
Bootloader gets locked and if you have TWRP recovery installed then there wont be any recovery and you will have to follow this method to get it working!
Thanks for the advise. But actually, I already followed the steps in the early portion of the thread before I post. I flashed the Chinese recovery (I can read Chinese) using the recovery tool downloaded from the link provided in this thread. However, after flashing, it automatically reboot the device and went into a boot loop.
Before it all happen, my phone was in Oxygen OS 2.01, rooted with TWRP recovery and xposed framework installed. I wanted to upgrade to 2.02, so I factory reset and wipe the phone cache, re-installed the Oxygen 2.0, then installed 2.01 and finally installed the 2.02 patch. All working quite well until I tried to root the phone again. I tried to boot into twrp but got into a boot loop. I then entered the fastboot mode and found out my bootloader was locked. I tried fastboot oem unlock and it won't work. By that time I could still boot up the phone OS normally so I went into developer setting and switch the bootloader lock option to unlock. I re-entered the fastboot mode and try oem unlock again. It still went into a bootloop after the unlock commend but worse, this time the power button no longer works. I cannot boot the phone OS, I cannot not boot into recover. Only fastboot still working.
I can only enter the fastboot mode by pressing V+ and power.
fastboot devices can identify my phone.
fastboot flash recovery recovery.img said bootloader is lock and flashing failed.
fastboot oem unlock will cause boot loop
Don't know what to do next.
I am on a business trip, so cannot try out any things right now.
If I were you, I would search for Oxygen Os fastboot images (I have seen them somewhere, probably on OnePlus forums directly), this is basically in fastboot mode applying a completely fresh rom by also deleting all content on the phone.
But only works if your bootloader is open again now.
Im trying all of this and i can get my OPT in fastboot mode+connected to PC but it never gives me that QUALCOMM in Device Manager. All I see is either ADB or Android and I can't update either of those with the drivers from OP. When I get ADB (on W10) it says; no need to update drivers, you're already updated. When I get Android (W7) it says windows can't find drivers for my device in the folder where the drivers are located.
I have very strange problem with my OPT. I'm not sure that it exactly the same problem what is described in the topic but I'll try to explain it
After one day of usage I found my phone completely discharged and it was warm. Looks like there was some process working/stuck all night long.
After that I tried to restart/power off and power on it, but without any success, the phone screen was black. I can't charge the phone.
Sometime I received the battery low message on the screen but after a few min it disappear and the same problem - I can't turn on it
I've tried all solution described in this topic without any success. It looks like the installation of image is done the recovery tool send the phone to the restart but nothing happens.
I tried to leave the phone more than 12 hours without charging and plug in after that, not work
I don't know what else I can do.
Maybe someone of you know how to resolve this problem ?
Thanks in advance and sorry for my English
ok, I am one step further now.
I could bring the device in that mode, flashed via this recovery tool. All partitions were flashed but still no recovery. How can that be? ooops.
I did that many time on my OPO already successfully. But of course with the full recovery package.
So question is, I would not mind starting from scratch... anybody knows where the "big" recovery package that erases everything is available?