Hi guys,

I've a s4 i9505 with a strange problem, it's impossible to receive/make phone call, or better i can call, the other side ring but the telephone get stuck, the network signal is ok, I can also surf into internet

my only doubt is that the imei that I see into the phone is slighty different from the one that i see on the back of the battery (the last 2 number are different)

that's the video http://www.youtube.com/watch?v=o0ps-acDOuo

any idea?
do you think I need to buy a box?

thanks