Dual SIM is the secret sauce that makes traveling with an eSIM so easy. It lets two SIMs run side-by-side on the same phone — your home SIM for calls and texts, your tukango eSIM for data abroad.
What is Dual SIM?
Dual SIM means your phone can have two active mobile profiles at once:
- Line 1 (your home carrier): keeps your phone number, receives calls and texts
- Line 2 (tukango eSIM): provides cheap, fast data at your destination
Both work simultaneously. You pick which line to use for which purpose in Settings.
Why this matters for travelers
Without Dual SIM, you'd have to choose between:
- Keeping your home number active (and paying expensive roaming charges), OR
- Removing your home SIM to save money (and missing important calls)
With Dual SIM, you keep both. Your bank can still text you a verification code. Your family can still reach you. And you pay tukango's local rates for data — usually 10-50× cheaper than roaming.
Setting it up
iPhone
After installing your tukango eSIM:
- Go to Settings → Cellular
- Both lines should appear (e.g., "Primary" and "tukango")
- Tap Cellular Data → choose tukango
- Tap Default Voice Line → choose your Primary SIM
- Open your tukango line settings → enable Data Roaming
- Disable Data Roaming on your primary line to avoid surprise charges
Samsung / Android
- Open Settings → Connections → SIM card manager
- Both SIMs should be listed
- Set Mobile data → tukango eSIM
- Set Calls and Messages → your primary SIM
- In Mobile networks, enable Data roaming (only the tukango line will use it)
Common pitfalls
Calls go out from the wrong number. Check Default Voice Line in iPhone Settings. Make sure it's set to your home SIM, not the tukango eSIM (which is data-only).
Apps still use the home line for data. Go to Settings → Cellular → [App name] and verify that data routing is set to your tukango line for individual apps if needed.
Battery drains faster. Running two cellular radios uses more power. Charge a bit more often or carry a power bank — it's a small price for the savings.
Phones that support Dual SIM
Most phones from 2018 onwards support Dual SIM with at least one eSIM slot:
- iPhone XS, XR, and all later models
- Samsung Galaxy S20, S21, S22, S23, S24, S25 series
- Google Pixel 3 and later
- Most flagship Android phones from major brands
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