I just unboxed a Samsung Galaxy S3 and immediately, before first boot, rooted it installing CWM Recovery and SuperSU. I found it to be not the best idea, becuase I forgot to launch the Samsung update to 4.1.
In fact, stock upgrade does reboot the phone into recovery but then CWM says the signature is invalid, etc. I should have done all this in inverse order (first stock upgrade, then root).
The question is: how can I upgrade this Galaxy to stock JB?
Idea: restoring the original recovery... but how?