Have had nothing but problem since upgrading to 2.2.  Now can't use phone.  Can anyone put me out of this misery and tell me how can I get it back to 1.6?

Have tried suggestion found on google e.g. get root version (4399) and run it from micro sim, doesn't work as wouldn't load, ends up with error message.

Any suggestion welcome. Am desperate!

Thanks.

Rob.