What Is the Essence of the Problem
After purchasing an eSIM with the Internet, the user gets access to all applications, sites, messengers — everything works. But when you need to call a local number, for example, a hotel or a doctor, regular calls do not go through.
Why? Because this is not a full-fledged SIM card, but only the Internet - without voice communication (without VoLTE, without SMS).
Solution: TooSim + Viber = Calls Anywhere
Many people forget that Viber has a feature called Viber Out — a way to call regular numbers using only the Internet. It works in almost any country.
Here's what the whole process looks like — from installing an eSIM to making a call.
Instructions: How to Make Calls with Data-Only eSIM
Step 1. Buy eSIM
First, you need to buy an eSIM with Internet. This can be done in advance on the TooSim website — select the country, pay for the order, and a QR code is sent to your email.
Installation takes 3-5 minutes.
Step 2. Activate eSIM on Your Phone
Depending on the device:
After activation, the Internet works immediately — you can check by opening a browser or any application.
Step 3. Install Viber
You can download Viber via Google Play or App Store. Installation is standard:
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1. Find in the app store.
- 2. Download and install.
- 3. Register (usually by phone number).
Step 4. Set Up Viber Out
Once Viber is installed, you need to activate the function for calls:
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1. Open the application.
- 2. Go to the "More" section.
- 3. Find the Viber Out item.
- 4. Top up your account:
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- via World Credits (universal credits for any country);
- - or select a specific plan for the desired country in the Plans section.
Prices are affordable — for 5 euros you can get enough minutes for several local calls.
Step 5. Make a Call
After replenishing your balance:
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1. Go to the "Calls" menu.
- 2. Select the desired contact or dial the number.
- 3. Click "Viber Out Call".
The call will be made via the Internet, but to a regular mobile or landline number.