Buy your ticket well in advance so that it is ready upon boarding.
You will always have to present your ticket to the driver or crew. If you travel by bus or tram you have to enter at the front.
The ticket is valid from the moment of purchase. Single tickets 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.
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 and 810. The tickets are not valid on routes from NSB, airport bus or other comercial routes.
AtB Mobillett is only valid in the official AtB Mobillett-app.