eSIM 101
What is an eSIM?
In plain English — no jargon, no fluff.
The simple answer
An eSIM gives you mobile data — internet access on your phone. That's it.
Instead of buying a physical SIM card, popping open a tiny tray, and swapping cards, you just scan a QR code. Your phone downloads a digital SIM profile, and you're online. It's built into your phone — no card, no tray, no shop.
It's data-only. You won't get a local phone number. You can't make traditional voice calls with it.
“But I can't make calls?”
Let's be honest: it's 2026. Nobody makes regular phone calls anymore.
Traditional voice calls use old-school cellular networks that sound terrible. Crackly audio, dropped calls, poor quality. Meanwhile, internet-based calls over WhatsApp, FaceTime, or Zoom are crystal clear — because data connections are faster and more reliable than voice networks.
Think about it: when was the last time you called someone using the regular phone dialer instead of WhatsApp or FaceTime? Exactly.
Data is literally all you need. And that's exactly what an eSIM gives you.
Everything that works over an eSIM data connection
Voice & Video Calls
- ✓FaceTime
- ✓Zoom
- ✓Google Meet
- ✓Telegram
- ✓Signal
Messaging
- ✓Telegram
- ✓iMessage
- ✓Signal
- ✓Messenger
Navigation & Travel
- ✓Google Maps
- ✓Uber / Lyft
- ✓Transit apps
- ✓Booking.com
- ✓Airbnb
Social & Entertainment
- ✓TikTok
- ✓YouTube
- ✓Spotify
- ✓Netflix
eSIM vs. airport SIM vs. carrier roaming
Stop depending on airport SIM shops. Be travel ready before you even board the plane.
Carrier Roaming
ExpensiveCost
$8-15/GB
Setup time
Automatic
Experience
Surprise bills when you get home
Airport SIM Shop
StressfulCost
$5-10/GB
Setup time
30-60 minutes
Experience
Lines, language barriers, fumbling with trays
dizomo eSIM
Best optionCost
From $3/GB
Setup time
Under 2 minutes
Experience
Set up before you fly — land connected
What about my phone number?
Your eSIM runs alongside your existing SIM. You keep your regular phone number for WhatsApp, iMessage, and everything else. The eSIM just adds data connectivity in the country you're visiting. Best of both worlds.