The logs show these app testers were using what is most likely a Apple iPhone 5 running iOS 5 and carrying two separate sets of mobile network codes (MNC)/mobile country codes (MCC). These codes are used to identify mobile carriers. When the app was being registered, the device used was logged as a new Apple device with MNC/MCC codes from both AT&T and Verizon. This would indicate that one device is being manufactured by Apple for both U.S. carriers. While this would offer seamless roaming between both types of networks, it probably also means that as already expected by most, the Apple iPhone 5 will not support LTE connectivity.