Has anyone else noticed a lack of decent cell service while on this plane on the ground, or is it just me? On my iPad and iPhone (both Verizon), I can barely get 3G while on the ground (taxiing and sitting at gate). I noticed this at DFW and at ORD. As soon as I stepped onto the jetway, my phone flipped to LTE, so I don't think it's just a bad service zone.