I don't think there's an official way to do that, I'm afraid. Have you tried contacting support?
Given the many issues 3.1 plus users such as you are facing I don't think I'll be accepting the upgrade for my 3.1 ( not plus). Hope you find a way to do it.
Comments
Given the many issues 3.1 plus users such as you are facing I don't think I'll be accepting the upgrade for my 3.1 ( not plus). Hope you find a way to do it.
Over slow
Hmd ok
For poor performance
No way you could downgrade a manufacturer driven phone.
You need a custom rom for that.