4.0
246K reviews
10M+
Downloads
Content rating
Everyone
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About this app

The most important services & advantages in the Mein o2 app.

With the multiple award-winning Mein o2 app, you can use the most important services and benefits anytime, anywhere.

It doesn't matter whether it's a prepaid or term contract, you'll find everything here at a glance. The o2 Business App is available for business customers.

The Mein o2 app offers the following functions:

FOR CONTRACT CUSTOMER
———
• Check consumption: data volume at home and abroad, telephony and SMS outside of flat rates - also as a home widget
• View tariff details and book tariff options
• Change customer data – conveniently while on the move
• View invoices and itemized bills (EVN).
• SIM & contract services such as number portability, order and activate eSIM, manage third-party services and much more.
• Send live check of the o2 network and fault report
• New customer benefits every month with our Priority loyalty program


FOR PREPAID CUSTOMERS:INS
———
• Check used data volume & units (minutes & SMS).
• View current credit and easily top up credit
• Change tariff or book additional options
• Change customer data – conveniently while on the move
• Live check of the o2 network


FOR MY HANDY CUSTOMERS
———
• Information on the My Handy contract
• Digital version of the invoice
• Insight into the installment plan
• Early Payment


PLEASE NOTE
———
Mein o2 is the app for o2 private customers. The »o2 Business App« is available for business customers. Alice Mobile connections and third-party providers are not supported.


LIABILITY/REQUIREMENTS
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Please note: This app is based on the online services of Telefónica Germany. Constant availability of the service cannot be guaranteed. To use the Mein o2 app, an account at o2online.de is required
Updated on
Mar 2, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Personal info, Financial info and 3 others
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.0
241K reviews
Danylo Kozakov
March 4, 2026
A budget provider that offers quite a lot of mobile data for a low price. However, it’s important to understand that the connection is not stable at all - the internet often drops for 2-3 minutes without any apparent reason. If a reliable connection is more important to you than the price, then o2 is definitely not your option. Personally, I use an additional SIM card from another provider so I can switch in case the connection is lost and still have proper internet access.
Alisa Kanarskaya
January 29, 2026
I can’t access my personal information, contracts, or invoices. I log in with the correct credentials, but the app just sends me back. I also can’t change my password because it asks me to log out first — which makes no sense. This has been broken for over a year, both in the app and the online portal. These are basic features that should simply work. By law, I must have access to my invoices. 😡
1 person found this review helpful
Telefónica Germany GmbH & Co. OHG
January 30, 2026
Hallo Alisa Kanarskaya, danke für deine aktualisierte Bewertung. Bitte versuche folgendes: Öffne Chrome (bzw. den genutzten Browser) am Handy. Gehe zu Einstellungen > Website-Einstellungen. Tippe auf „Alle Websites“. Suche die Website (o2online), von der du Cookies löschen möchtest. Lösche die Cookies. Anschließend kannst du dich wieder einloggen.
Cristiana Istrate
January 19, 2026
So many problems with logging in.. Edit to respond: the same issues that so many people have when logging in: "Da hat etwas nicht geklappt" or the fact that I cannot even login in with a code from my messages. Also, sometimes the option for code login appears, sometimes it doesn't. Like other users, I have tried with erasing the cache, reinstalling the app, and still nothing. Edit 2: I can login on the website but it's useless for recharging the prepaid card. I can only buy the option with a SIM
1 person found this review helpful
Telefónica Germany GmbH & Co. OHG
January 19, 2026
Hello Cristiana Istrate, danke für deine erneute Bewertung. Melde dich gerne bei unserem Service-Team, damit das geprüft und gegebenenfalls ein Ticket für die Technik erstellt werden kann.

App support

About the developer
Telefónica Germany GmbH & Co. OHG
appstore@telefonica.com
Georg-Brauchle-Ring 50 80992 München Germany
+49 89 787979443