The credit card mobile phones now provided on some aircraft, do not interfere with aircraft systems because they are wired to a special "base station" that has been designed to safely receive and transmit radio signals in the aircraft.
They are very glitchy tech that needs repairs
( z1 tech :mod ( z2 glitchy :degree ( z3 very ) ) :domain ( z4 they ) :ARG0-of ( z5 need :ARG1 ( z6 repair :ARG1 z4 ) ) )