I have a 1 year old Grand Quattro 4.1.2, I had the phone rooted and was using it happily, i.e. till I installed Latest Kies and then plugged in the phone.
Kies indicated a Software Upgrade, I was all excited and unrooted my phone and then upgraded it to the Samsung Stock ROM as detailed below
Now I am not able to root my phone, Odin and Odin3 both do not recogonize the phone
Thanks a ton in advance