Update 12/16/13 I called Dex and they had me download the Dex information and send it to them. They agreed there was a lot of "out of range" time, but we were going to watch it for one more sensor. During that next week I got a "transmitter failed" alarm so they mailed me out a new one. This new one works better. There are still a few times that it says it's out of range when she's wearing it in her pouch though. I haven't taken any notes to verify this, but it seems to me that it's out of range more when the sensor is on her belly compared to when it's on her arm. And it seems to do it more when she's at school than when she's at home. It just seems odd to me. But... I still love it so I won't complain too much. Charlotte's been wearing the Dexcom G4 for a few weeks. While I feel like the accuracy of the G4 is so much better than the 7, it's been giving the "out of range" a lot even when she's wearing it in her pouch around her waist. She'll come home from school sometimes and it's only got an hours' worth of plot marks for the whole school day. Is anyone else having this problem? Is it the sensor or the transmitter or the receiver?