Buy your ticket well in advance so that it is ready upon boarding, and make sure your phone is sufficiently charged.
You do not need to show the ticket on the green city buses and trams in the Trondheim area. Outside the Trondheim area, present your ticket to the crew or driver when you board.
The ticket is valid from the moment of purchase. Single tickets for bus and tram are valid for one hour and 30 minutes for one zone. Tickets for two zones are valid for two hours. Tickets for three or more zones are valid for at least four hours and 30 minutes. Single tickets are valid for four hours for passenger boat and ferry.
AtB Mobillett is only valid on buses and trams that are part of the public transport in Trøndelag, and on the boat routes 800/805, 810, 820/825, 830/835 and 980 and all ferries except 870 and 880. The tickets are not valid on routes from Vy (train), airport bus or other commercial routes.
AtB Mobillett is only valid in the official AtB Mobillett-app.