Dual-SIM Functionality Modern smartphones (iPhone 11+, Samsung S20+, Pixel 3+) allow Dual-SIM Dual-Standby (DSDS). This means you can keep your home physical SIM active for receiving important SMS and calls, while using your travel eSIM for all mobile data.
Optimizing for Performance
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Data Roaming: For travel eSIMs to work, you must enable Data Roaming specifically for that line in your settings.
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Primary Data Line: Set your new eSIM as the "Primary" or "Default" line for Cellular Data, but keep your home SIM as the default for Voice/Calls.
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Network Selection: By default, your phone will select the best partner network (e.g., Vodafone, T-Mobile). If the signal is weak, you can go to Network Selection, turn off "Automatic," and manually select a different local carrier node.
Troubleshooting "No Service" If you have successfully installed the profile but have no data:
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Toggle Airplane Mode: Forces a fresh "handshake" with the local tower.
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Check APN Settings: Some carriers require a specific Access Point Name (e.g., "internet"). Check your activation email for these specific credentials.
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Restart the Device: Clears the eUICC cache and forces a re-authentication with the SM-DP+ server.
