Dual SIM

Using eSIM as a Second Phone Number

An eSIM gives you a second phone number on the same device. Useful for separating work and personal, or for a local number while traveling without losing your home number.

LTE.app Smart Coach — automatic diagnosis
Smart Coach checks your APN settings, roaming state, and carrier connection automatically — no data needed. Open the app and tap Smart Coach to fix most issues in under 60 seconds.
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Step-by-step fixes

1
Install your eSIM plan from LTE.app
Scan the QR code from your welcome email. Your travel eSIM installs as a second line alongside your physical SIM. Both lines work simultaneously.
2
Label your lines clearly (iPhone)
Settings → Cellular → tap each line → Label. Name them "Personal" and "Travel" or "Work" and "Home" so you always know which line you are using.
3
Set default line for calls, SMS, and data
iOS: Settings → Cellular → Default Voice Line — select which number makes outgoing calls. Settings → Cellular → Cellular Data — select which line uses mobile data. Android: Settings → Connections → SIM Manager — set defaults for calls, texts, and data separately.
4
Use travel eSIM for data, keep home SIM for calls
The most common setup for travelers: keep your home SIM for calls and texts (to preserve your number), set the travel eSIM as the data line. Enable data roaming on the eSIM only.
5
Enable iMessage and FaceTime on both lines (iPhone)
Settings → Messages → Send & Receive → add both numbers. Settings → FaceTime → You can be reached at → enable both numbers. This lets you receive messages on both numbers.
6
Use Smart Coach for automatic diagnosis
Open LTE.app and tap Smart Coach. It checks your APN settings, roaming state, and carrier connection automatically — even without mobile data — and walks you through the exact fix for your device and carrier.

Frequently asked questions

Will my home number still receive calls when I use a travel eSIM?
Yes. Dual SIM keeps both lines active. Your home number receives calls and texts normally while the eSIM handles your data connection.
Can I get a local phone number with LTE.app?
LTE.app data plans do not include a local voice number by default. They provide data connectivity. For a local phone number, look for eSIM providers that specifically offer local number plans.
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LTE.app diagnoses and fixes most eSIM problems automatically — no manual steps needed.
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eSIM as a Second Phone Number — How to Set Up Dual SIM — LTE.app