Amtrak app has received a new update for Windows Phone Devices. The new version is 2.2.0.0. The latest update brings ability to view eTickets for monthly reservations and multi-ride journeys.
Amtrak Chnagelog:
We have expanded the eTicket capability to include Multi-Ride and Monthly reservations. They can be retrieved and scanned by Amtrak conductors the same as tickets for regular travel. If you are logged into your account on Amtrak.com when you purchase the pass you will see it on your trip list