mobile

I have a galaxy sii anycall that converted to international version.
It worked well and now says IMEI - (Nothing) and Baseband unknown.
i searched over the internet and found an app called GSII Repair.
I installed it and the procedure was failed.
I have the backup generated by the app "efs_save.tar" and "efs_save.tar.gz".
How can i rewrite this files manually to my device ? Is the efs partition corrupted ?
Please help. Thanks..!
God bless..!!