two active lines on one phone
What is 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.
How does dual SIM matter for travel.to?
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.
Related terms
Things you'll meet alongside dual SIM.
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