Brian O'Conner: This is where my jurisdiction ends.
Dominic Toretto: And this is where mine begins.
During the first tunnel sequence, all the cars travel very far into the mountains, turn lots of corners, yet not only is Gisele still able to speak to them over the radios, their GPS still works. GPS signals invariably need a clear 'sight' of the sky and can penetrate light cover, but most certainly not that depth and cover.
At the start of filming Fast and the Furious, Jordana Brewster did not have her driver's license.