FONIC is a free iPhone app developed by Telefonica Germany GmbH & Co. OHG that allows users to conveniently manage their mobile accounts. With this app, users can easily keep track of their remaining balance, inclusive minutes and SMS, as well as their remaining data volume in MB.

One of the key features of the FONIC app is the ability to top up your account. Whether it's through a recharge voucher or directly from your bank account, you can easily add credit to your account with just a few taps. For those who want a worry-free calling experience, the app also offers an automatic top-up option from your bank account.

The FONIC app also provides a comprehensive overview of all available tariffs. Users can freely switch between different tariffs at no additional cost, ensuring that they always have the best plan for their needs.

In addition, the app offers useful functionalities such as an invoice statement in PDF format for easy billing verification, the ability to update personal information and lock your SIM card, and the option to withdraw your remaining balance.

With the FONIC app, you can also have multiple logins saved within the app, allowing for easy switching between different accounts without the need to re-enter passwords.

Furthermore, the app provides a widget to quickly check your current usage on the "Today" view or via 3D Touch on the app icon. And if you ever need assistance, you can chat with the FONIC support team for free directly within the app.

Please note that FONIC callmobile is not supported, and FONIC mobile customers should use the FONIC mobile app instead. Additionally, the app currently does not support the booking of surf add-on packages or display the remaining data volume of such packages.

Please direct any problems, suggestions, or improvement ideas to providing a detailed description of the issue, your device type, and the operating system version.