A free app for Android, by Telia Norge AS.
OneCall is a mobile service that allows you to make calls and send messages to any phone number across the globe at a price that is almost half as much as your regular phone bill.
How to get started
To start using OneCall, you need to download the app. Once you do that, you will be able to make calls to any phone number that is connected to the Internet. You will not need to give your personal information or provide any form of identification.
To make calls, simply tap on the contact icon and you will be connected with the person you want to talk to.
You will be able to send text messages to any other person that is connected to the Internet, as long as the other person has the OneCall app installed.
