If your phone is using the 800 MHz band (such as Verizon CDMA), then you are breaking FCC rules. "Federal Communications Commission rules prohibit the use of c

If your phone is using the 800 MHz band (such as Verizon CDMA), then you are breaking FCC rules. "Federal Communications Commission rules prohibit the use of cellular phones using the 800 MHz frequency and other wireless devices on airborne aircraft. The ban was put in place because of potential interference to wireless networks on the ground." http://www.fcc.gov/guides/wireless-devices-airplanes http://www.fcc.gov/guides/wireless-devices-airplanes