Didn't see a thread like this so I thought I would try and get some ideas. What settings are you using? Are you in a 3G or 4G area? I live in 3G area (no 4G yet), so I don't have to worry about the phone switching back and forth. I currently have my phone set to CDMA only, WIFI off, Bluetooth off, All Location Services (GPS ect) off, NFC off, Beam off. Having decent luck, but want to hear some others opinions. Haven't really had a chance to put the phone to a good test yet with these settings.