The FAA rule you're referring to, 14 CFR 91.21, has no relation to the FCC rule. The FAA cannot authorize the use of cell phones aboard aircraft as long as the

The FAA rule you're referring to, 14 CFR 91.21, has no relation to the FCC rule. The FAA cannot authorize the use of cell phones aboard aircraft as long as the FCC forbids it. It's not the FAA's jurisdiction.