Anytime my phone moves from cellular to WiFi or vice versa, my phone won't make calls. Texts work, I ternet works...calls dont. People will say it goes straight to voicemail. Some may ring and when I go to answer the call ends. The only way to get it to work is to power off the phone and wait a few minutes and turn it back on. My husband has the same phone and the same issue. Sometimes, while even on WiFi, people say they hear every 4th word. Help!!