Blau.de review
Updated September 30, 2026 · TariffCue Editorial Team · Facts checked September 30, 2026
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Our verdict
Blau suits anyone who wants a cheap German mobile line on a handset they already own, with sim only plans starting at €6.99 a month and no credit check. The trade-off is term length: only Blau Allnet S Flex rolls, and no plan in the range is unlimited.
Key facts
- Best for
- The rolling Blau Allnet S Flex at €6.99 a month, sim only, with no credit check.
- Seller type
- Mvno (Source, checked September 30, 2026)
- Host network
- Telefonica (O2 network) (Source, checked September 30, 2026)
- SIM-only
- Yes (Source, checked September 30, 2026)
- Price from
- €6.99 (Source, checked September 30, 2026)
- Reference plan prices
- Blau Allnet M: 8.99 EUR/month, 40 GB, 24 months Blau Allnet S Flex: 6.99 EUR/month, 15 GB, rolling (1 month notice) No unlimited plan listed; highest listed is Blau Allnet XL Promo: 14.99 EUR/month, 80 GB, 24 months (Source, checked September 30, 2026)
- 5G
- Yes (Source, checked September 30, 2026)
- eSIM
- Yes (Source, checked September 30, 2026)
- EU roaming
- Fair use (Source, checked September 30, 2026)
- Roaming countries
- from 100 (Source, checked September 30, 2026)
- Credit check required
- No (Source, checked September 30, 2026)
- Multi-line discount
- Yes (Source, checked September 30, 2026)
- Markets
- DE (Source, checked September 30, 2026)
- Legal entity
- Telefónica Germany GmbH & Co. OHG (Source, checked September 30, 2026)
- Headquarters
- Germany (Source, checked September 30, 2026)
- Founded
- 2005 (Source, checked September 30, 2026)
- Support channels
- Phone, Chat, Help-centre, Email (Source, checked September 30, 2026)
- Billing
- Contract, Rolling, Prepaid
- Contract length
- 1, 24
- Official website
- blau.de
Pros and cons
Pros
- Entry is low for a contract mobile plan: Blau Allnet S Flex starts at €6.99 a month, under the €9.30 entry price across the site.
- No credit check is required, so a signup does not hinge on a credit file.
- An esim is available, so a compatible phone can be provisioned digitally on the host network.
- A multi line discount applies, which cuts what a household with several numbers pays per line.
- Billing spans contract, rolling and prepaid, so the same brand serves a rolling line, a fixed term and a prepaid option.
Cons
- Use inside the EU is on fair use terms rather than a stated allowance, so a month of heavy use in Europe can cost extra.
- Blau serves DE, so the deal does not stretch to a second market.
- Terms run 1 and 24 months, and the roomier plans, Blau Allnet M and Blau Allnet XL Promo, sit at the long end, while only Blau Allnet S Flex rolls.
- As a seller of type mvno on Telefonica (O2 network), Blau sets its own range, and that range stops at Blau Allnet XL Promo with no unlimited plan to step up to.
Who it suits
- Households that already own a handset and want an extra line, since every Blau plan is sim only and a multi line discount applies.
- Anyone who wants to sign up without a credit check, since none is required, and who can pick contract, rolling or prepaid billing from contract, rolling and prepaid.
- Light-to-moderate data users who travel now and then: roaming reaches from 100 countries, with EU use on fair use terms.
Who should look elsewhere
- Shoppers who want to buy straight from the host network: Blau is a seller of type mvno, while GETESA, Lonestar Cell MTN and yesss! each sell as a network.
- Anyone who needs unlimited data, since no Blau plan is unlimited; yesss! sets its own tariff as a network seller.
- Users outside DE, where the range is sold in a single market, so a network from their own home market such as GETESA or Lonestar Cell MTN is the fairer starting point.
Core features
Every Blau plan is sold sim only, so a handset is not part of the deal and the monthly figure is the whole cost. An esim is available, so a compatible phone can be provisioned without a paper card, and 5G is offered on the host network. A credit check is not required, so a signup does not hinge on a credit file, which is not the norm across the plans listed here. A multi line discount applies to extra numbers on the same account, so a household running several lines pays less per line than it would buying each one alone. Coverage abroad reaches from 100 countries, which handles a short trip comfortably and sits far wider than the home market, though the terms that apply while roaming are fair use rather than a fixed bundle.
The company behind it
Blau does not stand alone: the legal entity behind the brand is Telefónica Germany GmbH & Co. OHG, registered in Germany, and trading since 2005. A structure like that means the company on the other end of a billing or coverage question is a long established operator rather than a new entrant, which counts for something when a tariff needs changing part way through a term. Help runs on phone, chat and help centre, so a question can go to a person by phone, in live chat, through the help centre or by email, with a self service route sitting alongside for the routine checks. For anyone weighing a long commitment, the practical question is who is still there when the term ends.
How Blau.de compares
- 9.0 vs 8.5
- 9.0 vs 8.5
- 9.0 vs 8.5
- 9.0 vs 8.7
- 9.0 vs 8.6
- 9.0 vs 8.5
9.0 vs 8.8
9.0 vs 9.0
9.0 vs 8.5
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
9.0 vs 9.2
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
9.0 vs 8.7
9.0 vs 8.7
9.0 vs 8.7
9.0 vs 8.6- 9.0 vs 8.6
9.0 vs 8.6
9.0 vs 8.6
9.0 vs 8.5
9.0 vs 8.5
9.0 vs 8.5- 9.0 vs 8.5
- 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
Where Blau.de is available
- Available
- Germany
Countries from the brand (Source, checked September 30, 2026)
Frequently asked questions
How much is the cheapest Blau plan?+
Blau Allnet S Flex is the entry plan at €6.99 a month, billed rolling with a month's notice rather than a fixed term. The next tier, Blau Allnet M, carries a longer commitment, and the largest listed, Blau Allnet XL Promo, sits at the long end of the term range. Among the brands ranked on entry price, Blau holds position 132 of 258.
Does Blau run a credit check?+
No credit check is required, which is why these tariffs sit alongside the no credit check plans in this group. Billing spans contract, rolling and prepaid, so the same walk-through applies whether a customer picks a fixed term or a prepaid option, and an esim is available to get the line running without a paper card.
Do I need a new handset with a Blau plan?+
Every Blau plan is sim only, so a handset is not bundled and the deal starts at €6.99 a month on Blau Allnet S Flex with nothing else to pay off. An esim is available for phones that take one, and 5G is offered, so a compatible device can be set up and moved across without ordering a new card.
What happens to the price after a contract term ends?+
Terms run 1 and 24 months across the range, and only Blau Allnet S Flex rolls, so it can be ended on a month's notice at €6.99 a month. The roomier plans, Blau Allnet M and Blau Allnet XL Promo, sit at the long end, where the price that follows the term is set separately. Across the site, that later figure is €43.
How far does Blau roam?+
Roaming reaches from 100 countries, and use inside the EU runs on fair use terms rather than a stated allowance. A short trip is covered comfortably, while a month of heavy streaming or navigation abroad is where fair use terms start to cost, so anyone who needs a firm bundle abroad should weigh that before signing up.
Is there a discount for running more than one line?+
A multi line discount applies, so extra numbers on the same account cost less than buying them one by one. Billing on the account spans contract, rolling and prepaid, and each line keeps the same sim only, esim and 5G terms as the lead line, which makes Blau a straightforward way to cover a family with several handsets.
Who is behind Blau, and which network does it use?+
The legal entity is Telefónica Germany GmbH & Co. OHG, registered in Germany and trading since 2005, and the host network is Telefonica (O2 network). Blau is a seller of type mvno, so it builds its own tariff range on top of the host's coverage, and the markets it serves are DE.
How do I get help from Blau?+
Support runs on phone, chat and help centre, so a billing or coverage question can go to a person by phone, in live chat, through the help centre or by email. With an esim available and no credit check required, most of the setup can be done without a branch visit, which suits anyone setting up a line while travelling.
Sources
- blau.de checked September 30, 2026
Backs: Founded, Host network, Seller type
- blau.de/kontakt checked September 30, 2026
Backs: Support channels
- blau.de/prepaid-tarife checked September 30, 2026
Backs: Credit check required, Roaming countries
- blau.de/recht/impressum checked September 30, 2026
Backs: Headquarters, Legal entity
“Telefónica Germany GmbH & Co. OHG, Georg-Brauchle-Ring 50, 80992 München, Deutschland”
- blau.de/tarife checked September 30, 2026
Backs: Billing, ESIM, EU roaming, 5G, Markets, Contract length, Price from, Reference plan prices
“24 Monate Mindestvertragslaufzeit ... Vertrag ohne Laufzeit. Kündigungsfrist beträgt 1 Monat.”
- blau.de/tarife/jederzeit-kuendbar checked September 30, 2026
Backs: SIM-only
- blau.de/tarife/partnerkarte checked September 30, 2026
Backs: Multi-line discount
Compiled from 7 source pages, checked September 30, 2026. We did not open an account.
Not confirmed yet: Unlimited plan price.
Blau.de
The rolling Blau Allnet S Flex at €6.99 a month, sim only, with no credit check.