Fixed network service: O2 offers internet and phone service via fiber optics, cable, DSL, and 4G/5G
Telefónica Germany offers a comprehensive and attractive fixed-line portfolio. Under the O2 brand, the company provides fixed-line internet and landline telephone services using a mix of technologies, including fiber optics (FTTH), cable, DSL/VDSL and 4G/5G via the O2 Homespot – often with speeds of up to 1,000 Mbit/s. While the telecommunications provider operates and continuously expands its own mobile network, the company relies on a partner network of leading infrastructure providers for its fixed-line services – resulting in broad geographic coverage and a wide selection of options by address. Telefónica Deutschland currently reaches approximately 40 million households with a landline connection. Of these, the provider reaches 24 million with gigabit speeds. That is more than half of all German households.
View the O2 fixed-line offers in the online shop.
Awards for the fixed-line service
Telefónica Germany’s landline service is regularly recognized for its excellent quality. In the 2025 fixed-line test conducted by the journal connect, the provider earned a “very good” rating for the seventh consecutive year and ranked third among nationwide providers.1) In the stability category, the landline service even took second place in the test. In addition, O2’s landline service hotline ranked second in the “connect Hotline Test: Broadband Providers 2025” and was awarded the grade “outstanding” (476 out of 500 points).2) O2 achieved the grade “outstanding” in four out of five evaluation categories, and received top marks in the category “friendliness”.
O2 offers home internet service with extensive coverage across Germany via fiber-optic (FTTH), cable, DSL/VDSL, and 4G/5G
Fiber Optics (FTTH)
- Definition: Fiber optics directly to the home (“Fiber-to-the-home”); high bandwidths, Gigabit speeds possible.
- Suitable for: very high bandwidths, future-proof usage, upload-intensive applications. Availability is growing – check by address.
- Maximum bandwidth currently up to 1000 Mbit/s
- Definition: Broadband via cable network; Gigabit speeds possible.
- Suitable for: high download speeds, households with many devices.
- Maximum bandwidth up to 1000 Mbit/s
- Definition: Internet via copper lines; depending on the infrastructure, up to VDSL/Vectoring with higher bandwidths.
- Suitable for: reliable service, working from home, streaming.
- Maximum bandwidth up to 250 Mbit/s
- Definition: Internet at home via the mobile network (4G/5G) as an alternative when a landline is not available or not fast enough
- Maximum bandwidth currently up to 100 Mbit/s based on the plan
Partners & Technologies: How does Telefónica Deutschland achieve such extensive landline coverage?
In the landline sector, Telefónica Germany relies on wholesale and partnership models with leading infrastructure providers. This allows customers to sign up for landline products “from a single source” – with O2 as the contract partner, while the physical connection is provided via partner networks depending on the customer’s address. As a rule, O2 fixed-line products can be subscribed to wherever the partners offer fixed-line service to their customers. As an O2 mobile customer, you can often take advantage of bundled benefits.
Fiber Optics (FTTH)
- Telefónica Germany can market its own O2 fixed-line products via Telekom fiber optics to more than 12 million households (growth of ~2.5 million per year) — including equivalent connection and troubleshooting services (as of March 2026)
- In addition, there are regional fiber-optic partnerships (e.g., wilhelm.tel / EWE TEL) as well as nationwide partnerships with Unsere Grüne Glasfaser (UGG)
- O2 Home offers via cable landline are available through the use of the Vodafone cable network (approximately 24 million households), with additional coverage via Tele Columbus (total >26 million households)
- Landline and DSL products are based, among other things, on a long-term partnership with Deutsche Telekom (including VDSL/vectoring). Speeds of up to 250 Mbit/s are possible via DSL/VDSL.
- In addition, O2 Homespot is a mobile-based landline replacement product delivered via Telefónica Germany’s nationwide 4G/5G mobile network.
Availability, Ordering, Switching – How to Find the Right Product
The technologies available depend on your address. That’s why the first step is the O2 Availability Check.
Free Switching Service
When choosing an O2 fixed-line product, customers can take advantage of a free installation service for new subscriptions, moves, or technology upgrades. Through the O2 installation service, specialists will set up the home network at the customer’s residence upon request. They will connect the router and associated hardware and configure Wi-Fi access for all devices – from cell phones and TVs to smart home hubs – free of charge and reliably. The service is also available online via video call. More information.
Bundled Offers: Combination Discount for Mobile + Landline
When signing up for multiple O2 products, a combination discount may apply; this makes fixed-line products more attractive, especially when paired with mobile service.
FAQ
What fixed-line technologies does Telefónica Germany offer?
How widespread is gigabit availability on the fixed-line network?
How many households are accessible via fiber optics?
How does O2 provide cable connections?
What is the O2 Homespot?
How can you find out which technology is available at your address?
What kind of support is available for setting up service at home?
What does “up to 1,000 Mbit/s” mean?
Landline News
| 1) | connect Festnetzcheck 2025, issue 11/2025:: ‘Very Good’ (910 points); in total, the following ratings were awarded: 4 ‘Very Good’ ratings (946, 931, 910 and 909 points) |
| 2) | connect Hotline-Test Breitbandanbieter, October 2025: ‘Outstanding’ (476 points) for O2; in total, the following ratings were awarded: 2x ‘Outstanding’ (479 and 476 points), 2x ‘Very Good’ (469 and 463 points) |