Any time I try to make a call on my Samsung Galaxy S5, it just says dialing, eventually loses the network and says out of service area. Anyone who tries to call me, my phone never notifies me and just leaves a voicemail. I can still use text messaging and use the data for the internet, but I can not make or take calls. Even when I have full service, it just states dialing, then the network changes to 0 bars and the call ends stating out of service area. It's been happening for a couple weeks now and it happens anywhere I am. I've turned the phone on an off, taken the battery out and put it back in but it never changes the situation. How can I resolve this issue?