I noticed this same thing. Seems to happen when connected to the Airave for me. I should have a strong 3G signal when connected to the Airave, instead it's a strong 1X signal. When I leave Airave coverage, 3G pops back up. Not sure if this is related to the topic above or some other issue. I have two Airaves, one at home and one at work, same issue with both units and the iPhone 5.