Kalum: Call Abroad over WiFi

Kalum turns any internet connection into a phone line. Call landlines and mobiles in almost any country over WiFi or mobile data — from an airport, a café, a hotel abroad, or your couch at home. The person you're calling receives an ordinary incoming phone call. No app, no account, no internet needed on their end.

When Kalum helps

- You're traveling without a local SIM or a roaming plan
- Your mobile carrier charges too much for international calls
- You need to reach a landline, or someone who doesn't use messaging apps
- You want a dependable backup when internet calling apps are blocked or unstable

How it works

1. Sign up with your phone number
2. Add credit — start with as little as $2
3. Dial any international number

No subscription, no contract, no monthly fee. Your credit never expires, and you can check the exact per-minute rate for any country before you dial.

What makes it different

Apps like WhatsApp and FaceTime only work if the other person has the same app and an internet connection. Kalum routes your call through real telephone networks, so it rings on their regular phone like any other call. And because you only need internet on your side, your carrier's international rates never enter the picture.

Features

- See the per-minute rate before every call — no connection fees, no hidden charges
- Credit never expires, no minimum balance
- Real-time balance on your home screen
- Speed dial for the numbers you call most

Try it for $2

Add $2 in credit and make a real call. Test the connection and the rates before spending anything more.

Kalum works to nearly every country in the world. Wherever home is, you can reach it.

Coverage notes

Kalum reaches over 200 countries and territories. A small number of destinations aren't available: countries subject to U.S. calling restrictions, and a few remote island nations (Nauru, Tuvalu, Niue, Tokelau, Wallis and Futuna, São Tomé and Príncipe, Saint Helena). If your destination isn't listed in the app's rate table, we can't connect the call — your credit is never charged for calls that don't connect.