I'm currently on my second iPhone 5 experiencing the same problems prior to replacement. I am not receiving calls. My phone is going straight to voicemail, with absolutely no notification of missed calls either. This happens about 90% of the time. Especially after my phone has been inactive for a while. I am an independent contractor, and I use my phone as part of my business. So you can imagine how frustrated I am.
My iPhone 5 was just over a month old before I noticed problems. A Tier 2 representative noticed my phone was "inactive" after a while of it being asleep. Meaning, after put to sleep the Verizon service basically was unplugged form the phone; thus sending it directly to voicemail. The technician was under the impression that it was a problem with the phone. She kindly overnighted me a verizon like new certified device. Well guess what. SAME THING HAPPENING. An entirely different phone! How is this possible verizon? How much time of mine do I have to waste to have someone diagnose this problem. I've been a verizon customer, and iphone customer for years! I've never had an issue until this.
I upgraded from the iPhone 4, to the iPhone 5. The iPhone 5 has a sim card, while the 4 did not. Is there a chance that the sim card is corrupt? Or is this an LTE issue like everyone else is stating. Please keep me posted.
Thanks for the response. Keep in mind though, I'm not the technician. When a "Tier 2" tech tells me I need a new phone, I nod and say, "okay". Assuming that they are a "Tier 2" tech for a reason. No one said anything about the sim. It's just what I came to the conclusion of after it stopped working again.