One of the most avoidable Japan travel problems happens before the trip even starts. A traveler buys a Japan eSIM, scans the QR code at the airport, and the activation fails. The problem is not the eSIM plan or the Japanese network. Instead, the phone is still carrier-locked. The device rejects the eSIM profile. Mobile
Before you book your Japan eSIM, there’s one question that needs an answer: does your iPhone actually support it? It sounds like a simple yes or no, but iPhone eSIM compatibility for Japan travel has more layers than most travelers expect. Region-specific hardware variants, carrier locks, iOS version requirements, and the shift to eSIM-only models