Travel eSIM ReviewsWiFi and cellular on trains, ferries, and buses.
Onboard WiFi reliability, cellular coverage, and tunnel or open-water dead zones for 20 routes we have tested, with offline prep tips for each.
20 routes · Updated May 2026 · By The Field Test Unit
Field Pick: HelloRoam — 4.5/5 across 185 countries
Plans from $0.29/GB, from $3.49. 180-day refund. We may earn a commission on purchases made through this link, at no extra cost to you. Commissions never influence our rankings — our review process.
See plan prices12 routes
Trains
Shinkansen Tokaido Line (Tokyo to Osaka)WiFi 15 MbpsKTX (Korean High-Speed Rail)WiFi 50 MbpsTGV (French High-Speed Rail)WiFi 20 MbpsEurostar (London to Paris)WiFi 15 MbpsUK Regional TrainsWiFi 15 MbpsMorocco High-Speed Train (Al Boraq)WiFi 10 MbpsICE (German High-Speed Rail)WiFi 10 MbpsSwiss Scenic Trains (Glacier Express, Bernina)No onboard WiFiThailand Overnight Train (Bangkok to South)No onboard WiFiIndia Rajdhani Express (Delhi to Mumbai)No onboard WiFiSpirit of Queensland (Brisbane to Cairns)No onboard WiFiVIA Rail (Toronto to Vancouver - The Canadian)No onboard WiFi
Field Pick: HelloRoam
4.5/5 · 185countries · plans from $0.29/GB · from $3.49 · 180-day refund.
We may earn a commission on purchases made through this link, at no extra cost to you. Commissions never influence our rankings — our review process.
See plan prices