These units operate over the whole RhB network except for the Arosa and Bernina lines.
Most passenger trains between Landquart and Klosters / Davos / Scuol-Tarasp / St Moritz are worked by these units, usually in pairs. They also work some of the Chur area local services.
In October 2022, 25 units of these units were coupled together and run from the Albula tunnel down to Filisur to claim the world record for longest passenger train.