Root backup current rom fully with IMEI ?

[griffin2]

how to backup current rom =>full
titanium backup was not good
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and how to Imei backup before flashing phone?
in galaxy s => copy EFS folder into sdcart with RootExplorer
But,which folder in Galaxi mini?

 

[roofrider]

ya,even i need to know which app to use to backup the rom since cwm is not working...pls do reply..some1.!!!