The only second mobile number app
Available on the iOS App Store and Google Play Store
International packages for standard mobile plans can often be too expensive to justify. Mobile providers like Vodafone or Deutsche Telekom usually hit users with hidden roaming charges, making the bill even more costly. Introducing - SLYNUMBER's eSIM service - fast mobile data with affordable, flexible plans!
Rated by 5,500 users
Activate from the home screen.
Complete the one-time eSIM purchase.
Follow the installation instructions.
Connecting with an eSIM in Germany has never been easier. With our global eSIM plan, there is no need to be in any specific country - the plan automatically works wherever you travel to, including Germany. Here is the full breakdown.
You choose the amount of data plan you need and go from there, no hassle or physical SIM card required for your smartphone. Download the app and go.
You'll receive your eSIM instantly after purchase via a QR code, with the option to install it manually if preferred. We recommend adding it to your iPhone or Android device before you arrive for a smooth start.
Once you're in Germany, simply turn on the eSIM and activate your data, no roaming charges, no roaming fees, no SIM swaps, just instant high-speed internet.
Use the SLYNUMBER app to monitor your data usage, top up as needed, or switch between data package plans, all with no contracts or hidden fees.
We've reimagined eSIM as more than just a travel add-on; it's a global, always-available data companion designed to keep users connected anytime, anywhere.
SLYNUMBER’s eSIM works worldwide, including North America with no roaming fees or contracts. Just pay for the data you need, when you need it.
Your eSIM is sent instantly via email as a QR code. Install it in minutes — no physical SIMs, no waiting. Your eSIM is sent instantly via email as a QR code. Install it in minutes — no physical SIM card, no waiting. Perfect for first time users or returning customers.
Use WhatsApp in Germany for calls, texts, and location sharing without changing your number.
Our customer support team is ready to assist you no matter what.
Easy as 1-2-3!
SLYNUMBER's eSIM, paired with your phone number, will allow you to make calls and send SMS messages; however, you can also use the data to access your WhatsApp number.
Be sure to check whether or not you have an eSIM-compatible device that will access SLYNUMBER's eSIM services.
Once you scan the QR code and add your eSIM plan, be sure to wait until you arrive at your destination to activate the data plan. Also, be sure to enable data roaming in your settings to access your eSIM benefits.
The possibilities are endless!
You can use your data to access your WhatsApp number to make calls and send messages while traveling.
Use SLYNUMBER’s eSIM internet access to post stories and pictures while abroad.
No need to rely on cafe wi-fi or sketchy internet. Use your eSIM data to quickly create and upload content for your followers.
You don’t have to worry about getting lost in unfamiliar places, as your eSIM will provide reliable connectivity to access Google Maps.
Available on the iOS App Store and Google Play Store