I've been looking all day, I read from the last 6-hour, real.
I upgrade s3 gt9300 android 4.3 official. only after that thought this emergency.
I find nothing, apparently my imei is corrupt, says:
network: claroar (from Argentina)
imei: 640000 ...
service state: out of service
mobile network state: disconnected
Serial number: 0000000000
I did not copy the efs folder.
wifi worked before, probe changing the modem through recovery and now does not work, says authentication error
please help and sorry for my English