How do I do 2.2 Froyo back to Stock 2.1 no root??

[dieselbmw]

Hey I have 2.2 Froyo with root currently on my phone. How do I unroot 2.2 Froyo back to stock 2.1 with no root. Right now I just want to go back to stock 2.1 with no root. I do not have an original back up nandroid file. I came from stock 2.1 no root directly to 2.2 Froyo with root. Your help is greatly appreciated! Thank you!

 

[titans]

What you want to do is flash the 2.0.1 sbf. Then you can update to 2.1 stock. See hacking FAQ's section for more on that.

 

[dieselbmw]

oh okay thanks i understand now.