Hi OP,
Method 1 works perfect for me.
thanks for sharing. really appreciate it.
Been looking for it for a few days and failed so many methods.
FYI, Method 3 could work for around 10 minutes, after that 803-3001 error came and could no long connect back. Tried to re-install but same result.
By the way I have translated and shared your Method 1 at
http://bbs.ngacn.cc/read.php?tid=14145413&page=e
In which I mentioned that deviceAccount:.xml contains only Device ID and temp accound ID, you can easily copy the file and restore it whenever needed (but maybe you need to use same device?). And because the filename contains invalid char, we cannot edit the content or file name, but we can save the file in new folder with remarked names. for example
/Have_Tharja_Ninian_Sanaki/deviceAccount:.xml
/Have_2Ninian_2Sanaki/deviceAccount:.xml
Hope it helps.
Regards :)