I tried to make a call and it would dial but I cannot hear it ring or anyone talk. I messed with the volume and turned everything up, nothing happened. I tried putting it on speaker and still got nothing. I havent dropped my phone or gotten water on it. So I dont know what is happening. Please help!

kernel version

Guys my S3 started this problem yesterday completely out of the blue! when i call or receive calls, noone can hear anybody! neither me or them so basically if i call it makes that calling sound then silence... no tone and you can see they picked it up but no sounds. samething when they call me... but my freaking phone mic is absolutely fine... I didnt drop the phone or had an issue with it either
no sounds from caller (me) or callers (them) noone can hear anyone
Help me....HHHHHHHHeeeeeelllllp mmmmmmmeeeeee!!!

i did :

- reboot into Recovery mode and clear the cache
- perform a Factory Reset

but nothing happen

some said i need to use the Kies software on your PC to reload the correct firmware, but i have zero knowledge about the software

yes, i did updated the software to 4.3, is it related to my problems ??

how to do that sir ?

any software did i need to install in my pc first ??

or, if i sent to phone shop nearby, how much it will cost me ??