Remember the days of buying a SIM card at the airport, waiting 30 minutes for activation, and getting scammed on data rates? Those days are over. eSIMs have revolutionized international travel connectivity. If you're still buying local SIM cards or paying insane roaming fees, you're leaving money on the table. Here's everything you need to know about travel eSIMs.
An eSIM (embedded SIM) is a digital SIM card stored on your phone's hardware. Instead of physically inserting a card, you scan a QR code and activate data instantly. Your phone supports both your home carrier and the eSIM simultaneously, so you can receive calls and texts from your US number while using the eSIM for data.
Most modern smartphones support eSIM (iPhone XS and newer, most Android phones from 2020+). Check your phone's settings to confirm: iOS goes to Settings > Cellular > Add Cellular Plan. Android: Settings > Network & internet > Mobile network > Advanced > Carrier.
Traditional roaming (paying your US carrier): $10-15 per day for data, no cap. Overage charges possible. Can't disable accidental usage. Limited data speeds.
Local SIM card: $5-20 upfront (time and hassle at airport), 5-20 minutes setup time, you lose your US number for texts/calls, refunds are complicated or impossible.
eSIM: Activate in 2 minutes via QR code scan, keep your US number, data costs $5-15 per country per week, no overage charges (plan uses prepaid bucket), instant setup.
Step 1: Download the provider's app (or buy via website) before you travel
Step 2: Choose your destination and data amount
Step 3: Pay (usually $5-20 per country)
Step 4: Receive QR code via email or in-app
Step 5: Scan QR on your phone Settings > Add Cellular Plan
Step 6: Activate immediately or save for later
Step 7: When you land, switch to the eSIM in Settings and you have instant data
Total time: 2 minutes. No airport visits, no waiting, no lost SIM cards, no overage bills.
Airalo: The most popular travel eSIM worldwide. Covers 200+ destinations. Pricing: 1GB for $3-8 per country depending on destination. Referral program (both get $3 credit).
Simify: Strong European coverage, slightly cheaper than Airalo in Europe. Limited outside Europe.
Holafly: Specializes in unlimited data plans ($25-50 per week). Good if you plan heavy usage.
SafetyWing: Built into their travel insurance product. Solid but limited compared to dedicated eSIM apps.
Local carrier eSIMs: Many carriers (T-Mobile, Vodafone) offer their own eSIMs in specific countries. Sometimes cheaper, sometimes better coverage.
Light user (maps, messages, occasional browsing): 1-2GB per week
Normal user (navigation, social media, email, streaming music): 3-5GB per week
Heavy user (video calls, streaming video, lots of photos): 8-10GB per week or unlimited plan
Most eSIM plans come in 1GB, 3GB, 5GB, 10GB, and unlimited buckets. Buy a plan for your entire trip at once, or buy multiple smaller plans as you go. Monthly plans (30 days) are often cheaper than weekly if you're traveling 3+ weeks.
You can refill eSIM data remotely, so don't worry about running out. Just buy another plan instantly via the app.
eSIMs work everywhere but roaming partner quality varies. Best coverage:
Always check coverage for your specific destination on Airalo before booking. They show partner carriers, 4G coverage maps, and real user reviews per destination.
eSIM data speeds depend on your provider's roaming partners. Most get 4G speeds (20-100 Mbps). Some get 5G where available. Speed is usually comparable to what locals get.
Coverage within a city is usually excellent, but rural areas might have dead spots (same as any local SIM). Download offline maps (Google Maps, Maps.me) as backup.
QR code won't scan: Try manually entering the activation code instead (usually found in your email or app)
No data after activation: Switch airplane mode on/off, restart phone, check you've selected the eSIM as the active data connection
Can't get SMS codes for two-factor authentication: Use your backup US SIM for texts, or get codes via authenticator apps instead
Lost connection frequently: Try switching to a different network if available in the provider's app
1. Buy eSIM before you leave the US: You'll get home WiFi prices, not inflated airport WiFi. Also, you can activate on the plane before landing.
2. Use referral links: Both you and your friend get $3 credits. Accumulate credits and get free eSIM plans.
3. Buy a regional plan vs. single countries: Many providers offer "Europe" or "Asia" regional plans cheaper than buying each country separately.
4. Combine eSIM with WiFi calling: Many messaging apps (WhatsApp, iMessage, Telegram) work over WiFi. Use them for free calls/messages even without cellular data.
5. Keep eSIM + backup phone plan: If eSIM fails, you still have roaming on your main plan. Peace of mind costs nothing.
eSIMs are secure for basic travel use. Your data is encrypted same as any cellular connection. The main risk is SIM swap fraud (attackers convince your home carrier to transfer your number to a new SIM), but this is rare and preventable by setting a PIN on your account with your US carrier.
Travel eSIMs don't replace any security features of your phone. Use VPN, strong passwords, and two-factor authentication as always.
eSIMs are the modern way to stay connected while traveling. They're cheaper, faster to set up, more reliable, and more convenient than SIM cards or roaming. There's no reason not to use one.
Get an Airalo eSIM before your next trip. You'll save $100+ on data costs and avoid the hassle of airport SIM card kiosks forever. Use code SNAPCLAPS for 10% off (if available).
With cheap flights from Aviasales and a travel eSIM for data, your next international adventure just became significantly more affordable.
Get Your Travel eSIM Now →