A free program for Android, by Telefónica Germany GmbH Co. OHG.

AY YILDIZ is a prepaid mobile application designed to provide a simple and user-friendly way to manage the tariff plans of AY Mobile. Whether you have a fixed-term contract or you are a prepaid customer, you can now view and manage your options from your smartphone.

The app is available for Android and iOS devices and allows you to download and install it on your phone or tablet.

In order to use the application, you need to have a registered mobile number and an AY Mobile account in the same country. Registration is free of charge and can be done via the application or on the website.