So...I've just found out that I get maybe 1/10 calls that people place to my IP5. Some of those calls don't even ring (but I can see them as missed calls), and others don't show up as having made it through to my phone at all. I figured this out because people started leaving me messages on Facebook, or calling my home phone, etc, and telling me that they couldn't get through to me on my cellphone.
My phone is definitely not on vibrate or airplane mode (and hasn't been) and the ringer is on full blast. I'm also in an area with excellent coverage. Did I get a lemon? Is there anything I can do to fix it, or is a trip to the AT&T store for a replacement in order? (do they even have any to give me?)