1. iPhone 5 is unplugged - getting 3 bars of AT&T's 4G, and [relatively] good tethering speed. 2. Connected cable to charge. 3. Signal IMMEDIATELY drops to 1 bar and data speed drops to 0. No data at all. (haven't tried making a call) 4. Disconnected the cable. Signal is back to 3 bars and good data speed. 5. Repeated steps several times, seems to be consistent behavior. WTF?! Is Lightning cable shortening the antenna? Do you have similar experience? Besides this issue, I find iPhone 5 as prone to Antennagate as iPhone 4 - if you're "holding it wrong", the signal is noticeably attenuated.