congstar Prepaid Reviewed (2026): Telekom Quality, MVNO Prices

Which congstar plan is best for me?

1

BEST 4-WEEK VALUE

congstar Prepaid Allnet M

25 GB at €10/4w on Telekom network. Annualised €130/year — cheaper than Telekom's own M tier.

Data
25 GB
Price
€10/4w
/year
€130
Network
Telekom

Why we picked it: Cheaper than Telekom Prepaid M (€9.95/4w for 20 GB) and gives you 5 GB more data. Same network underneath.

2

BEST ANNUAL

congstar Jahrespaket

240 GB for the entire year at €100. Matches Telekom Jahrestarif for €0.05 less.

Data
240 GB/yr
Price
€100/yr
/month
≈€8.33
Network
Telekom

Why we picked it: Pay once. Pure D-Netz coverage. The simplest D-Netz prepaid option for a full year.

3

BEST FOR HEAVY USERS

congstar Prepaid Allnet L

45 GB at €12/4w. Most data per Euro in the 4-week tier on Telekom network.

Data
45 GB
Price
€12/4w
/year
€156
Network
Telekom

Why we picked it: For users who need more than 25 GB but don't want to commit to a year upfront.

4

BEST FLEXIBLE

congstar Prepaid wie ich will

Build your own from €2/4w. Add minute, SMS, and data buckets independently.

From
€2/4w
Custom
Yes
Network
Telekom
5G
Yes

Why we picked it: Right for users with unusual usage patterns (high SMS, low data, etc).

Where can I buy a congstar SIM?

congstar has unusually wide retail availability for an MVNO. Sold at:

  • Telekom shops (same physical store as Telekom branded)
  • Rewe and Norma supermarkets
  • Rossmann drugstores
  • MediaMarkt, Saturn electronics retail
  • Online with home delivery

Activation requires identity verification (legal requirement); congstar uses VideoIdent or in-shop verification.

Frequently asked questions

Does congstar run on the same network as Telekom?

Yes. congstar is a wholly-owned Deutsche Telekom MVNO brand and uses the same Telekom cell sites with the same coverage footprint. Speeds are capped at 25 Mbit/s on prepaid (vs. up to 300 Mbit/s on Telekom-branded prepaid), but signal availability is identical.

Is congstar cheaper than Telekom prepaid?

Yes, slightly. congstar M is €10/4w for 25 GB, Telekom Prepaid M is €9.95/4w for 20 GB. congstar gives you 5 GB more data for 5 cents more. Over a year, congstar M annualises to €130 vs. Telekom M at €129.35.

Does congstar prepaid include Switzerland in roaming?

EU roaming is included on all paid tiers. Switzerland data roaming appears in the fetched prepaid detail text for some congstar prepaid plans. Telekom prepaid bundles Switzerland more clearly; if Switzerland matters, verify on the specific tariff page before buying.

Is congstar 5G?

Yes. The prepaid pages confirm 5G/LTE access at up to 25 Mbit/s. The cap means you won't see 200+ Mbit/s peak speeds like Telekom-branded prepaid, but signal coverage and reliability are identical.