1&1 review
Updated September 30, 2026 · TariffCue Editorial Team · Facts checked September 30, 2026
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Our verdict
1&1 suits people in Germany who want a network's own SIM only tariff with EU roaming already priced in. The entry cost of €9.99 a month and a minimum term of 1 month keep the commitment small, so it works for anyone who does not want a long contract.
Key facts
- Best for
- SIM only mobile data in Germany with EU roaming already in the tariff.
- 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
- All-Net-Flat S 10 GB: EUR 9.99/month for 3 months then EUR 14.99, contract; All-Net-Flat M 50 GB: EUR 14.99/month permanent, contract; Unlimited on demand M 50 GB+: EUR 19.99/month permanent, contract (Source, checked September 30, 2026)
- Unlimited plan price
- €14.99 (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)
- Legal entity
- 1&1 Telecom GmbH (Source, checked September 30, 2026)
- Headquarters
- Germany (Source, checked September 30, 2026)
- Support channels
- Phone, Email, Help-centre (Source, checked September 30, 2026)
- Billing
- Contract, Rolling
- Contract length
- 1
- Official website
- 1und1.de
Pros and cons
Pros
- Entry at €9.99 a month and an unlimited price of €14.99 keep both ends of the range affordable.
- Roaming in the EU is included, so trips inside the bloc do not add to the bill.
- SIM only tariffs are available, so a handset already owned can run on the plan.
- 5G and an eSIM are both part of the range, so current handsets are covered on activation.
- 1&1 sells as a network, so the network and the bill come from the same company.
Cons
- The unlimited tariff runs at €14.99, above the €9.99 entry price, so heavy users pay up for the headroom.
- Billing runs on contract and rolling and even the shortest plan covers 1 month, so the prepaid model is not the one here.
- Support runs on phone, email and help centre, with no live chat in that list.
Who it suits
- People in Germany who want a SIM only plan from the network itself, since 1&1 sells as a network.
- Travellers who want EU roaming inside the tariff, as roaming in the EU is included.
- Customers who prefer a short commitment, with a shortest term of 1 month.
Who should look elsewhere
- Prepaid buyers, because 1&1 bills on contract and rolling with no prepaid option while GETESA lists prepaid on prepaid and contract.
- People who want prepaid and rolling options in the same range, which yesss! lists on contract, rolling and prepaid while 1&1 lists contract and rolling.
Plans and prices
Entry is €9.99 a month on the All-Net-Flat S plan, and that figure is introductory: the same plan costs more once the introductory months pass. All-Net-Flat M keeps a steady monthly rate on a contract, and the on-demand Unlimited on demand M tariff is priced above both. The unlimited price recorded for the brand is €14.99. Two figures matter on this tariff list, what a bill starts at and what it settles on, and All-Net-Flat S is the plan where those two differ.
Core features
SIM only tariffs are listed, so a plan can run on a handset the customer already owns. 5G is offered on the mobile range, and an eSIM is available, which means activation does not depend on a card arriving by post. With 1&1 selling as a network, the network, the tariff and the bill all sit inside one company rather than being split across a host network and a reseller.
How it compares on our data
On entry price, 1&1 sits at position 167 of 258 brands ranked, which places it in the middle of the field rather than at the front. The unlimited price reads differently: position 48 of 173 brands ranked. The same brand looks ordinary on one measure and strong on the other, so the line on the tariff list that matters decides how it reads.
The company behind it
The contract is with 1&1 Telecom GmbH, based in Germany, so the network and the billing sit with the same organisation. Support runs on phone, email and help centre, which covers phone, email and a help centre. That means questions go straight to the operator rather than to a separate reseller, and the euro pricing is set for the German market.
How 1&1 compares
- 9.0 vs 8.5
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9.0 vs 9.0
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9.0 vs 9.0
9.0 vs 9.1
9.0 vs 8.8- 9.0 vs 9.4
- 9.0 vs 9.4
9.0 vs 9.3
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9.0 vs 9.2- 9.0 vs 9.2
Budget Thuis Mobile
9.0 vs 9.1
9.0 vs 9.1
9.0 vs 9.1
9.0 vs 9.1
9.0 vs 9.1
9.0 vs 9.1
9.0 vs 9.0
9.0 vs 9.0
9.0 vs 9.0
9.0 vs 8.8- 9.0 vs 8.8
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9.0 vs 8.7
9.0 vs 8.7
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9.0 vs 8.6
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9.0 vs 8.5
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- 9.0 vs 8.5
- 9.0 vs 8.5
- 9.0 vs 8.0
- 9.0 vs 8.0
- 9.0 vs 8.0
- 9.0 vs 8.0
Frequently asked questions
What is the cheapest 1&1 mobile plan each month?+
The entry point is the All-Net-Flat S plan at €9.99 a month, and that rate is introductory rather than permanent. Once the introductory months end, the same plan costs more, so anyone keeping it longer should budget on the higher figure. The All-Net-Flat M plan keeps a flat monthly rate on a contract.
How much does unlimited data cost on 1&1?+
The recorded unlimited price is €14.99. The on-demand unlimited plan, Unlimited on demand M, sits above the entry tariff rather than beside it, which suits people who stream or tether often. It is listed as a permanent monthly rate on a contract, so there is no introductory step to track on that plan.
How long is the contract on a 1&1 plan?+
The shortest term listed is 1 month, and billing runs on contract and rolling. That means a rolling tariff exists for people who do not want a long tie-in, while a contract tariff is offered for anyone who prefers fixed terms. Worth checking which of the two sits on the chosen plan before signing up.
Can I get a SIM only plan and keep the phone I already have?+
Yes. SIM only tariffs are listed, so a plan can run on a handset already owned instead of a new device. The smallest of them is the All-Net-Flat S at €9.99 a month, and the same plan rises once its introductory months are over. A larger allowance is listed on All-Net-Flat M for heavier use.
Is roaming in the EU included?+
Roaming in the EU is included on the tariffs listed, so trips inside the bloc do not need a separate travel plan. The same treatment applies across the range rather than to a single tariff, and the entry plan starts at €9.99 a month. Any terms worth checking before booking are handled on phone, email and help centre.
Do 1&1 plans support 5G and eSIM?+
Both are available. 5G is offered on the mobile range and an eSIM is listed, so a compatible handset can be set up without a physical card. The entry plan, All-Net-Flat S, starts at €9.99 a month, and the on-demand unlimited tariff is billed on a contract at €14.99.
How do I contact 1&1 customer support?+
Support runs on phone, email and help centre, which covers phone, email and a help centre. That gives a direct route to the operator rather than a reseller, and the same company handles the network and the billing. There is no live chat in that list, so phone or email are the quickest written and spoken options.
Who is the contract with and where is it based?+
The contract is with 1&1 Telecom GmbH, based in Germany. As the network operator as well as the seller, it issues the SIM, runs the network and issues the bill, so support stays inside one organisation. Prices are set in euro for the German market, and questions are handled on phone, email and help centre.
How does 1&1 compare with other brands on price?+
On entry price, 1&1 ranks at position 167 of 258 brands compared, which places it in the middle rather than at the front. On unlimited price it ranks at position 48 of 173. The two lines tell different stories, so the tariff type decides how the brand reads.
Sources
- mobile.1und1.de checked September 30, 2026
Backs: ESIM, 5G, Seller type
“300 MBit/s 5G Highspeed”
- mobile.1und1.de/handyvertrag-ohne-laufzeit checked September 30, 2026
Backs: Billing, Contract length
“Ohne Vertragslaufzeit - 1 Monat Kuendigungsfrist”
- 1und1.de/handytarife checked September 30, 2026
Backs: EU roaming, Price from, Reference plan prices, SIM-only, Unlimited plan price
“3 Monate je 9,99 EUR”
- 1und1.de/impressum checked September 30, 2026
Backs: Headquarters, Legal entity, Support channels
“Elgendorfer Str. 57 56410 Montabaur”
Compiled from 4 source pages, checked September 30, 2026. We did not open an account.