BLACKSIM review

Updated October 12, 2026 · TariffCue Editorial Team

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Our verdict

BLACKSIM trades handset bundles for SIM only mobile contracts with adjustable terms and a focus on flat calling. For people in Germany who want a separate tariff for family use or a second device, it keeps choice centred on contract length and everyday flexibility.

Key facts

Best for
SIM only contracts with flexible terms in Germany
Markets
DE
Official website
blacksim.de

Pros and cons

Pros

  • SIM only mobile contracts without a bundled handset
  • Range of all net flat tariffs with flat calling and messaging options
  • Flexible contract lengths with option to adjust tariff over time
  • Supports EU roaming plus extra cards for partners or family

Cons

  • SIM only focus with no handset included alongside the tariff

Ready to try BLACKSIM?

Scored 8.0 / 10 by TariffCue.

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Who it suits

  • People who need a SIM only tariff
  • Households managing partner, family or second device cards
  • People who value adjustable contract lengths

Who should look elsewhere

  • Anyone looking for a phone included with the contract

Our full take

BLACKSIM sells mobile phone tariffs in Germany, including 5G data plans and Allnet flat plans, plus DSL and fibre.

How BLACKSIM compares

Frequently asked questions

What does BLACKSIM sell?+

BLACKSIM sells SIM only mobile tariffs centred on all net flat calling with options for messaging and high speed data including fifth generation access. The range also extends to home internet through DSL and fibre connections. You choose the tariff that matches your calling and data habits.

Where does BLACKSIM work?+

BLACKSIM operates in Germany and provides mobile tariffs for use there. You can also use your phone while travelling within the EU. Shared options support partners and family members as well as second device use.

How do contract length and tariff changes work?+

You can select from different contract lengths when you order your mobile tariff. You can also adjust your tariff later if your needs change over time. This keeps your contract aligned with everyday calling and data use.

Sources

Compiled from 1 source page, checked October 17, 2026. We did not open an account.

Not confirmed yet: Seller type, SIM-only, Billing, Price from, Reference plan prices, Unlimited plan price, Contract length.

BLACKSIM

SIM only contracts with flexible terms in Germany

8.0/10Visit

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