Airplane mode = ON defers the use of any external apps like remote control, GPS, etc.
A pity as the Zf lacks a true threaded receptacle for a cable release. Plus there is no 10-pin port or the equivalent (as with the Z5/6/7; Z8 and Z9 have the 10-pin port), thus using the USB port/Bluetooth/built-in wifi are the only options available.