A physical SIM, travel eSIM, home-carrier roaming and a portable Wi-Fi router meet different needs. Compare total cost, device compatibility, coverage, battery requirements and sharing options.

AI-generated illustration for this article: Japan — eSIM / Wi-Fi. .

Coverage and speed depend on the supported network, your exact location, your device and network congestion. A travel eSIM cannot provide a signal where its supported networks have no coverage.

Check the activation policy for your plan before installing: validity can begin at installation or at the first network connection. Reinstallation may not be supported.

Use Wi-Fi and an unlocked, eSIM-compatible phone. Confirm compatibility for your exact model and country of purchase.

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