All the advantages of your service world now in one app! All information about your tariff always at hand. With our sim24 Servicewelt app you have everything important at a glance: access your bill on the go, book suitable tariff options or update your data. Never miss the latest special offers and tariff highlights again! Make managing your mobile phone tariff on your smartphone or tablet even easier with the sim24 Servicewelt app! - Easily check and update your personal customer information. - View your invoices on your mobile device at any time. - Order a tariff change easily. - Book or deactivate your additional options. - Have services activated or blocked while you're on the go. - Easily order a replacement card or MultiCard. - Order our repair service for your mobile phone and view the status of the repair at any time. - Get help in our FAQ section and via the contact form. - Get the information you need about smartphone and cell phone usage. - Order a state-of-the-art smartphone or cell phone in our cell phone shop. - and much more. *A notice* Please note that constant availability of the sim24 Servicewelt app cannot be guaranteed.