Popular
Best price
Your number without borders
Download the SLYNUMBER app, choose your U.S. mobile number, and start using it instantly from anywhere in the world.
GLOBAL eSIM
One eSIM that works worldwide.
Your data, your way.
Get your eSIM The only one you’ll ever need. peryear$10
SLYNUMBER gives you one global eSIM with pay-as-you-go data. Stay connected anywhere, without contracts or expensive roaming fees.
Your trip doesn’t need unlimited data.
SLYNUMBER charges only for the data you actually use.
Most travelers spend their time on hotel, airport, and café Wi-Fi.
Don’t pay for data you’ll never use.
Why we’re better
One global eSIM
No SIM swapping
No expiration
Pay as you go
pricing
Data in 100+
countries
Global data means you stay connected in over 100 countries.
SLYNUMBER also includes built-in global eSIM connectivity, so you can get online in more than 100 countries without buying local SIM cards or paying expensive roaming fees.
Use only the data you need.
No contracts.
No roaming surprises.
No monthly commitments.
Just simple global connectivity.
Just download, activate and connect
Getting a mobile number has never been this simple. Everything happens right from the app.
01
Download the app
Download the app from the App Store or Play Store and pick the data plan.
02
Install your eSIM
Follow the instructions on your device and install the SLYNUMBER eSIM.
03
Connect
Once your eSIM is installed, simply return to the app to connect to mobile data.
Install once.
Travel everywhere.
Frequently asked questions
It’s one global eSIM: install it once and it connects to supported local networks in 100+ countries, switching automatically when you cross a border. You buy data in the SLYNUMBER app and pay only for what you use, at each country’s per-GB rate.
The SLYNUMBER eSIM costs $10 per year. Data is pay as you go: every destination has its own per-GB rate, listed on our destinations page and in the app, and you’re only charged for the data you use. No contracts and no roaming fees.
No. Data credits never expire, so whatever you don’t use carries over to your next trip. You can check your usage in real time and top up anytime in the SLYNUMBER app.
The eSIM works on iPhone XS and newer, Google Pixel 3 and newer, Samsung Galaxy S20 and newer, and most eSIM-capable tablets, as long as the device is carrier-unlocked.
Download the SLYNUMBER app, pick your data and follow the instructions to install the eSIM by QR code or manually. It only takes a few minutes, so you can set it up before you travel and land already connected. Our step-by-step guide walks you through it.
Yes. The SLYNUMBER eSIM only handles data, so your home SIM and its number stay active alongside it, and WhatsApp keeps your usual number. Want a U.S. mobile number too? You can add one anytime with a SLYNUMBER subscription.
