Nobody else mentioned this and it may or may not be part of the problem some people are seeing with their Mobley devices. I have one and it works fine in my RV on the vehicle data port or on a USB 12v 2.1a power connection. It doesn't work on a USB 12v 1.0a power connection. I've tried running it on 110v using a cheap USB power converter and discovered that if the power converter can't supply about 2 amps the Mobley will either fail to come up all the way or it will operate in a really flaky fashion. Simple solution was to buy a couple of 110v USB power plugs from Walmart (about $6) that put out 2.4 amps.