Yes, surprisingly often.
- Hiking: You will have a strong signal at the base and at the top of Pulpit Rock (Preikestolen). For Trolltunga, you will have a signal at the start and at the "Troll's Tongue" itself, but you will lose signal on the remote parts of the long hike.
- Trains: You will have a strong signal for most of the Flåm Railway and Bergen Line, but it will drop inside the longest mountain tunnels.