The onboard system works by receiving internet signals from national telecommunications carriers using 4G and 5G mobile towers. These signals are then transmitted throughout the train as a shared Wi-Fi network. Instead of each passenger receiving a private independent internet signal, everyone on board connects to the same guest network broadcast inside each coach. Since the internet is pulled from nearby cellular towers, connectivity tends to feel stronger in areas where tower density is higher. Large cities such as New York City, Chicago, San Francisco, and Boston offer robust cellular coverage. When trains pass through these metro corridors, Wi-Fi speeds generally feel adequate for working professionals, students, and casual users. Video calls on platforms like Zoom and Microsoft Teams usually perform well enough for meetings when the signal is not overloaded with simultaneous heavy data usage. https://amtraktrainstations.com/blog/does-amtrak-have-wifi/