I awoke up in the morning and found that my phone was dead. I tried to turned on and can see only "SAMSUN GALAXY S3 GT-I9300" and remains here for ever.
I tried to enter in RECOVER MODE and it gives me error "E: UNABLE TO MOUNT /efs" Unable to mount /system etc etc and whole screen is covered with this MOUNT errors.
I tried to put it in download mode "Down volume key + Menu + Power key", computer can see a device is connected but unable to connect with phone using KIES, ODIN and ADB shell.
Can someone help me to solve this problem?
— modified on Apr 12, 2016, 5:25:46 PM