I got the XR back around November or December. I have been having trouble with dropping calls when I make or receive calls. I ended up resetting network settings and the problem persisted. I went to the place where I got my phone from and then they replaced the SIM card. Problem persisted and got a replacement phone in February. This past Thursday (14 March) it happened again and today (16 March). I took it to the store to begin the same troubleshooting process. Not impressed with this persisitent problem. When I went to the store today (16 March) the staff said that there have been three people in the past day that came in with the same problem. If Verizon cannot own up to their end of the contract can I terminate and switch to AT & T without suffering early termination fees? Is this a Verizon problem or Apple OS problem?