The Mein o2 App is a multi-award-winning app that allows users to access important services and benefits anytime and anywhere. Whether you have a prepaid or postpaid contract, everything is available at a glance. For business customers, the o2 Business App is available. The app offers various functions for contract customers, including checking data usage, viewing tariff details, changing customer data, viewing bills and itemized bills, managing SIM and contract services, and checking the o2 network's status. Additionally, customers can enjoy monthly benefits through the Priority loyalty program.

Prepaid customers can also benefit from the Mein o2 App. They can check their data usage and consumed units, view their current balance, recharge their balance, change their tariff, and manage their customer data. They can also check the status of the o2 network.

My Handy customers can use the app to access information about their My Handy contract, view a digital version of their bill, check their installment plan, and make early repayments. However, it is important to note that the Mein o2 App is only available for o2 private customers, and not for Alice Mobile connections or third-party providers.

It is important to note that the Mein o2 App is based on the online services of Telefónica Germany, and its availability cannot be guaranteed. To use the app, an account with o2online.de is required. Overall, the Mein o2 App is a convenient and user-friendly way for o2 customers to manage their accounts and access important services and benefits.