Frequently asked questions
What is an eSIM and how does it work?
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An eSIM (embedded SIM) is a digital SIM card built into your phone. Instead of inserting a physical card, you download a plan directly onto your device. Once installed, your phone connects to a local network in your destination — no SIM swap needed. Most phones made after 2019 support eSIM.
Is my phone eSIM compatible?
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Most modern smartphones support eSIM, including iPhone XS and newer, Samsung Galaxy S20+, Google Pixel 3 and newer, and many others. To check: on iPhone go to Settings → General → About and look for an EID number. On Android, go to Settings → About Phone. Your phone must also be unlocked (not carrier-locked) to use a travel eSIM.
How do I install an eSIM?
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After purchasing, you'll receive a QR code by email. On iPhone: go to Settings → Mobile Data → Add eSIM, then scan the QR code. On Android: go to Settings → Network → SIM cards → Add eSIM. The whole process takes about 2–5 minutes. We recommend installing before you travel while on Wi-Fi, then activating when you land.
How much data do I need for my trip?
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As a guide: light users (maps, messaging, occasional browsing) need about 1–2 GB per week. Moderate users (social media, video calls) need 3–5 GB per week. Heavy users (streaming, remote work) need 10 GB+ per week. If you're unsure, choose a slightly larger plan — unused data is better than running out mid-trip.
Can I keep my existing phone number?
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Yes! Most eSIM plans are data-only, so your existing SIM stays active for calls and texts while the eSIM handles data. Your phone number doesn't change. Some plans include calls and SMS if you need them — look for the "Calls + SMS" badge when comparing plans.
What happens if I run out of data?
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Most providers let you top up or buy a new plan through their app or website. You don't need a new eSIM — just add more data to your existing one. We recommend downloading your provider's app before you travel so you can top up easily if needed.
Are the prices shown in my currency?
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Use the currency selector in the top right corner of this page to see prices in your local currency. Exchange rates shown are approximate and for reference — the final price at checkout will be in the provider's currency (usually USD). Your bank or card may apply a small foreign exchange fee.
How does Ternroam make money?
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Ternroam earns a small affiliate commission when you purchase a plan through our links — at no extra cost to you. The price you see on the provider's site is the same whether you come through Ternroam or go directly. We only recommend plans we'd genuinely use ourselves.