Alfa Romeo Giulia Quadrifoglio 2017 Owner's Manual page 6

The use of these devices inside the passenger compartment (without an external antenna) may cause the electrical systems to
malfunction. This could compromise the safety of the vehicle in addition to constituting a potential hazard for passengers' health.
If mobile phones/laptops/smartphones/tablets are inside the vehicle and/or close to the electronic key, a reduced performance of the
Passive Entry/Keyless Start system may occur may occur.
Caution!