The ja! mobil App, developed by congstar Services GmbH, provides users with quick and uncomplicated access to their personal ja! mobil customer area. With a simple login process that supports fingerprint authentication, managing your ja! mobil account has never been easier.

This free app offers a range of useful features, including:

• Display of current prepaid balance
• Monitoring of data usage
• Convenient prepaid top-up options (using cash codes or automatic top-up)
• Easy tariff changes
• Booking, switching, and canceling of options
• Access to connection data
• Viewing and updating customer information
• Access to and management of the legitimation PIN

Please note that the ja! mobil App is still in the early stages of development, and the developers welcome your honest feedback, which can be provided directly through the app.

Enjoy using our app!

Your App Team