two active lines on one phone
何ですか dual SIM?
A phone configuration where two SIM lines (any combination of physical + eSIM) can be active simultaneously. Common patterns: home physical SIM + travel.to eSIM, work eSIM + personal eSIM, primary + backup.
どうやって dual SIM travel.toの問題?
Most flagships since 2020 support dual SIM. With travel.to, your home number stays on its primary SIM/eSIM and continues to receive calls and SMS (including 2FA codes from banks). Data routes through whichever line you mark as primary for cellular data.
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