Since a trip about 3 weeks my phone has had an issue with making/receiving calls and sending texts. It is random, won't work at home or work one day but will the next however it is getting worse. I do not have any issue with mobile data and I receive texts with no problem. Also have an issue when the phone does make a call no one can hear me...I can hear them just fine. My be a seperate issue however the microphone issue started the same time as the other issue. ¿Alguna sugerencia?