The FAA in 14 C.F.R § 91.21 prohibits the use of portable electronic devices, including mobile phones, for all commercial flights and for those private flights being made under instrument flight rules (IFR).
FAA 14 CFR§91.21禁止使用便携式电子设备，包括手机，所有商业航班和仪器飞行规则（IFR）下的私人航班。