U600 Hi my samsung u600 , when I answer a call I can hear person on phone but they can not hear me

The speaker/earpiece is possibly faulty. You need to take the phone tto a reputable mobile phone engineer or Samsung service point for testing/repair.

can you hear music /ringtones at all

i think you should connect your phone to pc and update it this might help.and if it dosent you have to get the phone checked on shop

hi :)
Well, your problem is mine problem, and the problem of all U600 with some use. The problem is the Flex Cable that connect to LCD is "broken". So, you just need to go to the Samsung office (if you have guaranty) or do the same like me... I have no guaranty left so, I will buy a new flex cable in ebay, and then I will make the changes by myself... but of course, you shouldn't do that if you don't understand nothing of that... :P I'm just waiting a letter from ebay to complete my account and "Voila" :) If you just need to know how to open your phone to change, there are a really good video on youtube about that ;)
Good luck ;)

ur earpiece has got damaged u can get it done through a mobile repair shop near by ur place..

Hi on my samsng g600 i can accept calls but i cant hear the caller yet the caller can hear me,please help!

problem in your speaker

may need to reinstall the software of the phone,,may have a glitch

hi!the problem is the speaker cable might be out it's place,or the speaker is not good anymore!if you want you can try to open your fone.

simple repair look on ebay for mic