O2 Mobile Unlimited by Telefónica S.A. - flat-rate data for heavy users

O2 Mobile Unlimited offers truly unlimited 5G data at a fixed monthly price for private and business customers in Germany. This product is driving the price of Telefónica S.A. stock (ISIN ES0178430E18).

O2 Mobile Unlimited is the SIM card you slide into your phone and never think about data limits again, even when streaming a 4K football match on the sofa late at night. The sound of the crowd stays smooth because the tariff does not throttle your gigabytes. Product chief Wolfgang Metze likes to call it a "freedom package" for people who live online.

Unlimited 5G data at a fixed price

Telefónica S.A. markets O2 Mobile Unlimited as its flagship flat-rate data plan in Germany, positioned above the regular O2 Mobile S, M and L tariffs. The contract offers unlimited data volume with 5G access on the O2 network, without a fair-use cap that would slow down users after a certain threshold. The plan is available for both new and existing O2 customers who migrate from legacy tariffs like O2 Free.

The standard consumer version O2 Mobile Unlimited is currently advertised at a monthly fee in the range of 59.99 euros, depending on promotions and device bundles, with a 24-month minimum contract term in most cases. Business clients can choose a variant like O2 Business Unlimited, priced differently but based on the same unlimited data principle. A core selling point is the combination of flat-rate data with a generous handset subsidy for top smartphones from brands such as Apple and Samsung, which Telefónica highlights in its marketing materials.

Tariff structure and included services

According to the official O2 tariff overview, O2 Mobile Unlimited includes unlimited national data, unlimited calls and SMS to German networks, and EU roaming with a specific high-volume fair-use allowance. The plan supports 5G with up to 300 Mbit/s in download on compatible devices within 5G coverage areas, while falling back to LTE/4G or 3G where 5G is not yet available. Customers can add up to two O2 Connect SIMs in some versions, allowing laptops or tablets to share the same data pool, though the exact Connect options vary by campaign.

O2 also emphasizes digital extras baked into the tariff, such as security and cloud services offered via the O2 app. In press materials, Telefónica Deutschland CEO Markus Haas points out that unlimited plans like O2 Mobile Unlimited cater to "data-hungry" users who rely on permanent connectivity for video calls, cloud storage and entertainment. On the company’s website, the tariff is placed prominently in the "Tarife" section next to lower tiers that cap data at 10, 30 or 60 gigabytes per month. The visual presentation often shows a dark blue background with a bright turquoise accent, framing the unlimited label as a bold promise.

Network performance and customer experience

There is a tactile side to the tariff: slide the O2 Mobile Unlimited SIM into your smartphone, and the small piece of plastic becomes a gateway to Telefónica’s upgraded German network. Independent tests by connect magazine and other outlets have confirmed that O2 has significantly improved its coverage and speed in recent years, closing the gap to Deutsche Telekom and Vodafone in many urban zones. In city centers, speed tests often show stable 5G data rates that keep Netflix streams and cloud backups running without visible buffering. For heavy users, this reliability is as crucial as the unlimited tagline.

Telefónica highlights in its annual report that data usage per SIM in Germany continues to rise, driven by video, gaming and remote work. Unlimited tariffs like O2 Mobile Unlimited are designed to capture this trend and keep customers from jumping between offers. Metze has publicly stressed that many consumers are tired of counting gigabytes and want a simple equation: one price, all data. That messaging resonates with freelancers, students and families who use their phones as primary internet access, especially in homes without fixed broadband.

Positioning in the O2 portfolio

Within the broader O2 line-up, O2 Mobile Unlimited sits at the very top as the data-heavy choice, above O2 Mobile XL and the smaller S to L variants. Telefónica Deutschland segments its tariff grid so that entry-level plans hit lower price points, while the unlimited option appeals to power users willing to pay for peace of mind. On the business side, O2 Business Unlimited mirrors this structure, serving companies whose staff travel frequently and need constant connectivity. The plan is marketed alongside cloud and security solutions under the Telefónica Business brand, reinforcing a full-service image.

From a competitive angle, O2 Mobile Unlimited challenges similar offers from Telekom’s MagentaMobil and Vodafone Red tariffs. Price comparison sites in Germany often list O2’s unlimited option as one of the more aggressive offers in terms of cost per month, especially when promotional discounts apply for the first one or two years. That positioning is deliberate: Telefónica uses price and volume to gain market share in a mature market where the number of SIM cards is already high, but switching remains common.

Context and Telefónica S.A. stock

Unlimited mobile tariffs like O2 Mobile Unlimited play an important role in Telefónica’s German strategy and contribute to recurring service revenues, which the group reports as a key metric in its quarterly updates. Higher-value contracts with long terms help stabilize cash flows and support network investments. For investors watching Telefónica S.A. on Spanish exchanges, the development of O2’s tariff mix, including uptake of O2 Mobile Unlimited, is one of several levers behind the company’s earnings profile. The Telefónica S.A. stock (ISIN ES0178430E18) trades in euros on the Spanish market and reflects expectations for both the German O2 segment and other national operations.

Key facts on O2 Mobile Unlimited

• Product: O2 Mobile Unlimited
• Manufacturer: Telefónica S.A.
• Category: Software/Service/Subscription
• Market launch: Introduced as part of the O2 Mobile tariff family in Germany after the phase-out of O2 Free, with ongoing updates.
• MSRP / Price: Consumer plans typically around 59.99 EUR per month, subject to promotions and device bundles.
• Availability: Available in Germany via O2 shops, partners and the official O2 online channel.
• Target group: Heavy data users among private customers and business clients who require constant 5G connectivity.
• Highlight / USP: Truly unlimited mobile data with 5G access on the O2 network, combined with flat-rate calls and SMS.