OnePlus 9 series Boot-looping after the latest OxygenOS 11.2.6.6 update [Possible Issue fix]
OnePlus 9 series received the OxygenOS 11.2.6.6 update with several camera improvements in the last week of May 2021. The update was 160 MB in size and was rolled out to the OnePlus 9 and OnePlus 9 Pro devices. The latest news coming to light is that the OnePlus 9 series is in all sorts of issues after the OxygenOS 11.2.6.6 update. One major issue that was reported by the users is the ‘Boot-looping’ of the OnePlus 9 and OnePlus 9 Pro.
What is Boot Loop or Boot-looping?
Booting is termed as the starting of any device, specifically computers. A boot loop occurs when a specific change (system update) or damage has been done to a device.
You can state that a boot loop has happened when you turn on a device and it fails to boot while entering a loop in which it performs the starting sequence continuously and repeatedly.
OnePlus 9 and 9 Pro having boot loops
The news of the OnePlus 9 series causing boot loops came to light when some users on Twitter posted screenshots of their OnePlus devices boot-looping.
A user on Twitter, named ‘@howtomen’, posted the screenshot of his brother’s OnePlus 9 having a boot loop after he updates his OnePlus device with OxygenOS 11.2.6.6. It displayed an error message saying “init_user0_failed“.
check the thread – click here
He was replied to by a user with a suggestion to fix the issue of boot-looping of OnePlus 9 series devices. It was unclear whereas to the issue/problem was actually solved by that method.

OnePlus 9 series boot loop issue fixed
Another OnePlus user posted a screenshot of his OnePlus 9 Pro device causing a boot loop after downloading and installing the latest OxygenOS 11.2.6.6 update. His OnePlus 9 Pro refused to boot and promptly went into a boot loop.
Surprisingly, he managed to fix the issue of boot-looping in his OnePlus 9 Pro himself by wiping the cache from the recovery.
This method worked to resolve the boot loop issues faced by the OnePlus 9 Pro at least for that user. It is still uncertain if that method will work for everyone with a One Plus 9 or OnePlus9 Pro device.
Our take
The OnePlus 9 and OnePlus 9 Pro received the OxygenOS 11.2.5.5 during the first week of May 2021 along with the May Android Security patch. Then it received this update of OxygenOS 11.2.6.6 in the last week of May 2021 which led to these issues.
There are still some devices on OxygenOS 11.2.5.5 as they have not received the latest OxygenOS 11.2.6.6 update. What we advise, is that you avoid downloading the latest update as there has been no official fix or statement from OnePlus about this issue. Though the issues might not happen in every OnePlus 9 and OnePlus 9 Pro device, it is still better to be safe than sorry.
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