o2 review

Updated September 30, 2026 · TariffCue Editorial Team · Facts checked September 30, 2026

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Our verdict

O2 in Germany bundles mobile and home internet under a single brand, which suits shoppers wanting a prepaid starter tariff, a sim only contract and home broadband from the same provider. The trade-off is commitment: contract plans run on a fixed term and a credit check applies, with entry at €9.99.

Key facts

Best for
Germans who want mobile and home internet from a single network brand.
Seller type
Network (Source, checked September 30, 2026)
SIM-only
Yes (Source, checked September 30, 2026)
Price from
€9.99 (Source, checked September 30, 2026)
Reference plan prices
O2 Mobile on Demand M: 19.99 EUR/month, 50 GB+, 24 months; O2 Mobile Unlimited S Special: 24.99 EUR/month, unlimited, 24 months; O2 Prepaid S: 9.99 EUR/4 weeks, 20 GB, prepaid (Source, checked September 30, 2026)
Unlimited plan price
€24.99 (Source, checked September 30, 2026)
5G
Yes (Source, checked September 30, 2026)
eSIM
Yes (Source, checked September 30, 2026)
EU roaming
Included (Source, checked September 30, 2026)
Hotspot sharing
Yes (Source, checked September 30, 2026)
Credit check required
Yes (Source, checked September 30, 2026)
Multi-line discount
Yes (Source, checked September 30, 2026)
Markets
DE (Source, checked September 30, 2026)
Legal entity
Telefonica Germany GmbH & Co. OHG (Source, checked September 30, 2026)
Headquarters
Germany (Source, checked September 30, 2026)
Support channels
Phone, Chat, Help-centre, Community (Source, checked September 30, 2026)
Billing
Contract, Rolling, Prepaid
Contract length
1, 24
Official website
o2online.de

Broadband

Top download speed (Mbps)
1,000 (Source, checked September 30, 2026)
Upload speed (Mbps)
500 (Source, checked September 30, 2026)
Price from
€9.99 (Source, checked September 30, 2026)
Reference plan prices
O2 Mobile on Demand M: 19.99 EUR/month, 50 GB+, 24 months; O2 Mobile Unlimited S Special: 24.99 EUR/month, unlimited, 24 months; O2 Prepaid S: 9.99 EUR/4 weeks, 20 GB, prepaid (Source, checked September 30, 2026)
Setup fee
€9.99 (Source, checked September 30, 2026)
Price after contract
€34.99 to €59.99 (Source, checked September 30, 2026)
Router
O2 HomeBox 4 rental, FRITZ!Box routers optional (Source, checked September 30, 2026)
Address checker
https://www.o2online.de/e-shop/internet-festnetz (Source, checked September 30, 2026)
Markets
DE (Source, checked September 30, 2026)
Legal entity
Telefonica Germany GmbH & Co. OHG (Source, checked September 30, 2026)
Headquarters
Germany (Source, checked September 30, 2026)
Support channels
Phone, Chat, Help-centre, Community (Source, checked September 30, 2026)
Technology
Fttp, Fttc, Cable, 5G, Fwa
Contract length
1, 24

Apps and profiles

Elsewhere
WikidataWikipediaLinkedInX

Pros and cons

Pros

  • Roaming in the EU is included on the plans, which saves buying a roaming pass on a trip.
  • Billing covers contract, rolling and prepaid terms, so a prepaid top-up and a contract plan can sit with the same provider.
  • A multi line discount applies, so extra lines on the same account come cheaper than a separate provider's tariff.
  • It sells as network, so the network itself supplies the service and the support.

Cons

  • A credit check is required, which is a hurdle for buyers whose credit record is unclear.
  • Contract terms of 1 and 24 months are on offer, and the longer one ties you up for a long stretch.
  • On unlimited price the ranking is 94 of 173, and yesss! lists a starting price of €0, so the lowest figure in this group sits elsewhere.
  • Service is sold in a single market, DE, so households outside Germany need a different provider.
o2

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Scored 9.0 / 10 by TariffCue.

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Who it suits

  • People in Germany who want a mobile line and home broadband handled by the same operator.
  • Households adding extra lines, since a multi line discount applies.
  • Travellers who want EU roaming covered in the tariff rather than bought at the point of use.

Who should look elsewhere

  • Shoppers chasing the lowest starting price: yesss! lists a starting price of €0.
  • Buyers who want to stay off a contract: GETESA bills on prepaid and contract terms, which keeps prepaid in the mix.

How it compares on our data

On entry price, O2 sits at 167 out of 258 brands listed on our data, and on unlimited price it ranks 94 of 173. Neither figure puts the brand near the top of the table, so the case for it rests on what the plans include and how many billing styles sit behind the headline price. Read the two sections below alongside these ranks, because the price alone does not separate O2 from the field.

Plans and prices

The entry point is the prepaid line, where O2 Prepaid S comes in at €9.99 on a short billing cycle with no contract term attached to the smallest outlay. The unlimited option, O2 Mobile Unlimited S Special, is priced at €24.99 a month and runs on a fixed term rather than a rolling one. In between sits the data-capped O2 Mobile on Demand M, sold as a contract plan with a large data allowance. The shapes matter here: a small prepaid top-up and a monthly unlimited commitment are different commitments, and the contract plans carry a term the prepaid option does not.

Core features

The basics are covered. O2 sells sim only tariffs, so you can bring your own handset and pay only for the network. eSIM is offered, which suits a phone that takes a digital profile rather than a plastic card, and 5G is on the plans. Hotspot sharing lets the phone work as a router for a laptop or tablet. A multi line discount applies, so extra lines on the same account come cheaper than a separate provider's tariff. The item to plan around is the credit check, which is required before a plan is set up.

The company behind it

The operator is Telefonica Germany GmbH & Co. OHG, and it is headquartered in Germany. O2 sells into a single market, DE, so the tariffs, coverage and support are built for the German market rather than a multi-country footprint. Support runs on phone, chat and help centre, so a caller, a chat window, a help centre and a community board are all open to you, and the same desk handles the broadband side of the account.

How o2 compares

Where o2 is available

Available
Germany

Countries from the brand (Source, checked September 30, 2026)

Frequently asked questions

What is the cheapest way to start with O2?+

The smallest outlay is the prepaid range, where O2 Prepaid S costs €9.99 on a short billing cycle with no contract term attached. The same provider also sells contract plans on a fixed term, and billing runs on contract, rolling and prepaid terms overall, so you can move between prepaid and contract without changing provider.

How much does unlimited data cost on O2?+

The unlimited tier is O2 Mobile Unlimited S Special at €24.99 a month, sold on a fixed term rather than a rolling month. On our data that price ranks 94 of 173 brands, so it reads as a mid-priced unlimited plan rather than the cheapest on the list, with the data-capped O2 Mobile on Demand M below it.

What contract terms can I sign up for?+

O2 lists contract terms of 1 and 24 months, with billing covering contract, rolling and prepaid styles across the range. The reference plans, including O2 Mobile on Demand M and O2 Mobile Unlimited S Special, sit on the longer term, while the prepaid option carries no contract at all, which gives room to change direction before a long commitment.

Is roaming in the EU included?+

Roaming in the EU is included on these plans, so travelling inside the bloc does not mean buying a separate roaming package. That matters for people who cross a border regularly, and it pairs with eSIM availability for travellers who would rather set up a profile on arrival than queue for a card.

What comes with an O2 plan, and is a credit check needed?+

As a network seller, O2 provides the network itself, and the plans include eSIM, 5G and hotspot sharing so the phone can act as a router. A multi line discount applies, making extra lines cheaper than separate providers. A credit check is required, and it applies to the order rather than to a single tariff, so sign-up is not purely a choice of plan.

Who runs O2 in Germany, and where do they operate?+

The operator is Telefonica Germany GmbH & Co. OHG, and it is headquartered in Germany. O2 sells into a single market, DE, so the tariffs, coverage and support are aimed at the German market, with the same entity behind every plan. Customers based elsewhere, or looking for a pan-European tariff, would need a different provider.

How do I get help from O2?+

Support runs on phone, chat and help centre, which means phone, chat, a help centre and a community all form routes to an answer. The combination suits people who would rather start in a self-serve help centre and escalate to a call when the issue needs a person, and it covers both the mobile and the broadband side of the account.

Does O2 sell home broadband, and what does it cost to set up?+

Home broadband is sold over fttp, fttc and cable lines, with top download speeds of 1,000 Mbps and uploads of 500 Mbps. A setup fee of €9.99 applies, hardware provision is set out in O2 HomeBox 4 rental, FRITZ!Box routers optional, and post contract prices of €34.99 to €59.99 are the figure to check before signing anything beyond the initial term.

Sources

  • o2online.de checked September 30, 2026

    Backs: Markets, Multi-line discount, Price from, Seller type, Support channels

    “telefonierst du zuverlassig deutschlandweit”

  • o2online.de/e-shop/internet-festnetz checked September 30, 2026

    Backs: Address checker

    “Verfugbarkeit prufen for your address”

  • o2online.de/internet-festnetz checked September 30, 2026

    Backs: Top download speed (Mbps), Price after contract, Technology, Upload speed (Mbps)

    “Max. Download 1.000 MBit/s”

  • o2online.de/internet-festnetz/glasfaser checked September 30, 2026

    Backs: Router, Setup fee

    “O2 HomeBox 4 and FRITZ!Box 5690 Pro Glasfaser Router”

  • o2online.de/mobilfunk/prepaid checked September 30, 2026

    Backs: ESIM

  • o2online.de/recht/impressum checked September 30, 2026

    Backs: Headquarters, Legal entity

    “Georg-Brauchle-Ring 50, 80992 Munchen, Deutschland”

  • o2online.de/tarife checked September 30, 2026

    Backs: Billing, Credit check required, EU roaming, 5G, Hotspot sharing, Contract length, Reference plan prices, SIM-only, Unlimited plan price

    “24 Monate / Monatlich kündbar / Prepaid-Tarife”

Compiled from 7 source pages, checked September 30, 2026. We did not open an account.

o2

o2

Germans who want mobile and home internet from a single network brand.

9.0/10See alternatives

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