The students were not allowed to bring any kind of electronic devices on the trip besides cameras, so Edward had to check-in with the other Cullens via pay phone.
Edward's group spent a great deal of time on their tour bus. From Montreal to Quebec City was a three hour ride, not to mention the various stops in and around both cities. It was hard for Edward to be on the bus for long stretches of time, all the while pretending to be your average teenage boy. To remain inconspicuous, Edward channeled his inner teen human and would draw on sleeping kid's faces and sneak up on people to scare them while they were distracted.
The autophile forced Big T to snap a pic of him near the grill of the tour bus. Who knew they made Mercedes Benz buses?