With your CheapESIM, you will typically have 4G signal for the majority of the coastal journey on Vietnam's Reunification Express train between Hanoi and Ho Chi Minh City. However, be prepared for occasional drops in connectivity, especially when the train passes through tunnels or more remote, mountainous sections, such as near the Hai Van Pass. For most of the trip, you'll stay connected and save on data costs.
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Will I have internet on Vietnam's Reunification Express train with CheapESIM?
Updated April 22, 2026
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