International SIM Cards: What Actually Works
I’ve tried most of the options at this point. Here’s the honest breakdown.
eSIMs Changed Everything
If your phone supports eSIM (most newer iPhones and Android flagships do), this is the move. No swapping physical cards, set it up before you leave, works instantly when you land.
Airalo is what I use most. Cheap data plans for specific countries or regions. Buy it in the app, install in 5 minutes. Coverage has been solid in Europe, Asia, and South America.
Google Fi works great if you already use it as your main carrier. Data just works internationally at the same rate. Simple but you need to be a Fi subscriber.
Physical SIMs Still Have a Place
Older phones. Countries with spotty eSIM coverage. Backup when eSIM networks are congested.
T-Mobile plans include unlimited international data on some tiers. Slow but free. Good for maps and messaging, not for anything intensive.
Local SIMs are still the cheapest option if you’re staying in one country for a while. Buy at the airport or a phone shop. Usually costs $10-20 for way more data than any international option.
What to Actually Do
Short trip, multiple countries: eSIM (Airalo or similar). Set it up before you go.
Extended stay, single country: Local SIM from the airport. Best value.
Already on Google Fi or T-Mobile International: Just use your plan. Don’t overthink it.
Before You Go
Make sure your phone is unlocked. Carrier-locked phones can’t use other SIMs.
Download offline maps. Even with data, saves battery and works in dead zones.
Check coverage for your specific destination. Not all providers work equally everywhere.
The worst option is using your regular carrier’s roaming. Those bills get ugly fast.
