I have had my Samsung Galaxy S4 for two months now and I have already had to send it away and get a replacement phone because of an internal issue. Now, my phone is not able to accurately make phone calls. For example, if I dial out, it will dial and go through but I cannot hear anything at all. I have tried taking out my battery/SIM card and restarting my phone but nothing seems to be working. Also, when I am receiving a call, the same thing happens... it comes through but I cannot hear anything.