congstar review

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

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Our verdict

congstar suits anyone in DE who wants a low entry price, short terms and no renewal jump, on the Telekom network. Entry starts at €2, and the price rise rule keeps that figure as agreed, though the top data tier stops short of unlimited.

Key facts

Best for
Low entry cost, monthly flexibility and roaming in DE without a long commitment.
Seller type
Mvno (Source, checked September 30, 2026)
Host network
Telekom (Source, checked September 30, 2026)
SIM-only
Yes (Source, checked September 30, 2026)
Price from
€2 (Source, checked September 30, 2026)
Reference plan prices
Allnet Flat S: 20 EUR/month, 50 GB, monthly cancellable | No unlimited plan - max Allnet Flat L 200 GB | Prepaid wie ich will: 2 EUR/4 weeks, 1-15 GB, prepaid (Source, checked September 30, 2026)
5G
Yes (Source, checked September 30, 2026)
eSIM
Yes (Source, checked September 30, 2026)
Wi-Fi calling
Yes (Source, checked September 30, 2026)
EU roaming
Included (Source, checked September 30, 2026)
Mid-contract price rises
No price rise - price stays as agreed (Source, checked September 30, 2026)
Multi-line discount
Yes (Source, checked September 30, 2026)
Legal entity
Telekom Deutschland GmbH (Source, checked September 30, 2026)
Headquarters
Germany (Source, checked September 30, 2026)
Support channels
Chat, Phone, Help-centre, Community (Source, checked September 30, 2026)
Billing
Contract, Rolling, Prepaid
Contract length
1
Official website
congstar.de

Apps and profiles

Get the app
App Store
Elsewhere
WikidataWikipediaLinkedInX

Pros and cons

Pros

  • Entry pricing starts at €2, well under the €9.30 site median, with prepaid billing available through contract, rolling and prepaid.
  • No price rise - price stays as agreed, so what you sign up for is what you keep paying at renewal.
  • Terms run 1 month, short enough to leave without a long tie-in.
  • Runs on Telekom, with 5G, an eSIM and wifi calling all offered as yes facts on the line-up.
  • Roaming in the EU is included, and support runs on chat, phone and help centre.

Cons

  • The largest reference plan, Allnet Flat L, is a capped data allowance, so constant streaming or heavy hotspot sharing meets a ceiling.
  • The entry figure of €2 belongs to a prepaid bundle, so the monthly contract option Allnet Flat S sits well above the €9.30 site median.
  • Support reaches chat, phone and help centre, where email is not among the listed channels.
  • As an mvno on Telekom, congstar buys capacity rather than setting its own tariffs, so a direct network seller such as GETESA can price the same coverage its own way.
congstar

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Scored 9.4 / 10 by TariffCue.

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Who it suits

  • Households wanting one bill option across contract, rolling and prepaid types, from prepaid to contract.
  • Travellers in the EU who want roaming at included rather than paying per use.
  • People on the Telekom network who would rather buy through an mvno than go direct.

Who should look elsewhere

  • Anyone who needs truly unlimited data, since the congstar reference plans stop at Allnet Flat L; GETESA, listed as a network, is worth reading if you prefer a direct network tariff.
  • Those wanting a single monthly contract price, since the cheapest figure belongs to a prepaid bundle while Allnet Flat S costs more each month.

What it does well

You can buy a SIM only plan here, and prepaid is one of the billing types you can choose alongside contract and rolling billing through contract, rolling and prepaid. 5G is offered, so new handsets can use the faster network where coverage allows. An eSIM is available, which means no plastic card to wait for and no slot to fill on a phone that takes one. Wifi calling is supported, useful in weak signal spots or indoors. A multi line discount is offered, so more than one number on the account is worth asking about. Support runs on chat, phone and help centre, which covers chat, phone, a help centre and a community, and roaming in the EU is included.

Who runs it

congstar is run by Telekom Deutschland GmbH, which is registered in Germany. That means the provider on your paperwork is a German company, so the terms, complaint route and consumer protections you read are the German ones. As an mvno rather than a network, it buys capacity and sells the service on top, which is why its prices can sit below the network's own tariffs. Support is reachable on chat, phone and help centre: chat, phone, a help centre and a community, so phone and chat cover the common cases and the help centre handles the rest on your own time.

How congstar compares

Frequently asked questions

How much does congstar cost to get started?+

Entry starts at €2, which sits below the €9.30 site median for this kind of plan. That figure belongs to the prepaid option, Prepaid wie ich will, on a short prepaid billing cycle. The contract option, Allnet Flat S, costs more each month, so the cheapest headline price and the monthly contract are separate products.

Will my monthly price go up when I renew?+

The stated rule is No price rise - price stays as agreed. Nothing in that rule allows the agreed figure to climb, which is the main thing to check before signing a contract option. Contrast that with typical market behaviour, where the €43 site median for a post-contract price sits well above the €9.30 entry median.

Do congstar plans include unlimited data?+

The reference plan list has no unlimited entry; the largest is Allnet Flat L, and its data allowance is capped, which matters for constant streaming or heavy hotspot sharing. For lighter use, Allnet Flat S is cancellable each month. Entry on the prepaid side starts at €2, so the contract option sits well above the cheapest figure.

What network does congstar actually run on?+

Service runs on Telekom, so coverage and speeds match that network rather than a weaker partner. The provider is Telekom Deutschland GmbH, registered in Germany, which makes congstar an mvno selling on that network. Where you live matters more than the pricing: check coverage at home before you commit.

Can I leave the plan quickly if it stops working out?+

Terms run 1 month, and Allnet Flat S is cancellable monthly, so there is no long tie-in to negotiate. The 78% site share for single month terms shows how common that flexibility is across listings, though many providers tie people in for longer.

Is there roaming included when I travel in the EU?+

Roaming in the EU is included, which is one of the clearer inclusions on offer. For context, only 36.1% of listings across the site include EU roaming, so this sits above the norm rather than matching the bare majority. If a trip takes you outside the EU, this does not cover it.

Does congstar offer an eSIM and wifi calling?+

Both are available: an eSIM is offered, as is wifi calling. An eSIM removes the wait for a card and works on phones with no physical slot, and wifi calling helps indoors or in dead spots. 5G is offered too, so recent handsets can use the faster network where it is deployed.

How do I get help if something goes wrong?+

Support runs on chat, phone and help centre: chat, phone, a help centre and a community. Phone and chat handle anything urgent, the help centre covers the common questions in your own time, and the community is there for other users' fixes. Email is not among the listed channels, so use the help centre for anything written.

Sources

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

Not confirmed yet: Unlimited plan price.

congstar

congstar

Low entry cost, monthly flexibility and roaming in DE without a long commitment.

9.4/10See alternatives

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