the microphone does not work

I think you need to check your headphone. I did not face any issue like this. Once, one of my friends also face the same issue and he changed his headphone. Now everything is working fine.  

the same thing is happen to me.... could you resolved it??

Me too. This is very frustrating.

Yes, I think you check your headphone because sometimes headphones do not work. That's why I think if you change your headphone then everything is good work.