fonworld offers cheap international calls via free SIP-access. Register now and we provide you a free starting balance of 1€* to try our service. The registration ist free of charge, without obligation and you can cancel it at any time.

1. My SIP Account

Please register free of charge and try fonworld:

2. Options to use fonworld

We offer you the option of using fonworld via your mobile or PC/MAC. Just download the respective application and install it on your device. We will be happy to help you with the set-up-procedure! Alternatively you can accordingly change the set-up of your telephone system so you benefit from the low fonworld-rates while using your landline.

3. Calling

As soon as you have completed the download and setup-procedure of the chosen softclient on your PC/MAC or the respective application for your mobile, you can place calls conveniently and low-priced via SIP. Via your dashboard you can adjust your settings and f.e. organize your contacts in your personal telephone book.

Your phonebook can store up to 99 phone numbers. Once you added the number to your phonebook you can use the corresponding speed dial to call your contacts.


First simply dial the 1 and your first telephone book entry will be called.
You can simply call the number that you want to reach, e.g. 030 555 555 55


*The sign-up bonus is only paid once per registered telephone-line/per customer.
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