Which D-Netz prepaid SIM is best in Germany in 2026?

Which D-Netz prepaid SIM is best in 2026?

Best app-only · Best 4-week value · Cheapest 25 GB · Best annual pack

Seven prepaid brands run on Telekom's D-Netz. fraenk wins overall — €10/month for 20 GB, monthly billed, Switzerland-inclusive roaming, no SCHUFA, no paper contract. congstar Allnet M takes second on retail availability and 25 GB per 4-week cycle. NORMA connect S 5G, ja!mobil Smart, Penny Mobil Smart and KAUFLAND MOBIL Smart S 5G are functionally identical at €8.99/4 weeks for 25 GB. congstar Jahrespaket at €100/year for 240 GB is the lowest GB-per-euro option.

What does the Telekom D-Netz actually mean?

D1 origin · 99% population coverage · connect Netztest #1 since 2013

D-Netz (German: Deutsches Netz) is shorthand for the network operated by Deutsche Telekom and its predecessor Deutsche Bundespost. The original 1992 GSM network was branded D1 — Vodafone Germany ran the parallel D2 network. The "D-Netz" label survives in the prepaid market as the colloquial name for the Telekom-hosted radio access network used by congstar, fraenk, ja!mobil, Penny Mobil, NORMA connect and KAUFLAND MOBIL.

Telekom Deutschland publishes coverage figures of over 99% population coverage on 4G/LTE and around 97% on 5G as of the network status reports filed with the Bundesnetzagentur in 2025. Independent connect Netztest — the annual benchmark run by connect magazine in cooperation with umlaut/Accenture — has rated Telekom's network the best in Germany 13 years in a row, from 2013 through to the 2025 edition. Telekom scored 968 of 1,000 points in the most recent edition, ahead of Vodafone (922) and Telefónica/O2 (876).

Practically: the same cell towers, antennas, fibre backhaul, and core network deliver the signal whether you buy a Telekom MagentaMobil contract, a fraenk app SIM, or a Penny Mobil prepaid card. Where MVNOs differ is in the maximum throughput their wholesale agreement allows (25 vs 50 vs 300 Mbit/s), the 5G priority class assigned to their traffic, and access to VoLTE and VoWiFi features. Coverage and outdoor signal quality are identical.

Which D-Netz prepaid SIM is the cheapest?

Cheapest 25 GB · Cheapest GB-per-euro · Cheapest with 5G

The cheapest 25 GB D-Netz prepaid plan is €8.99 per 4 weeks, sold under four identical labels: NORMA connect, ja!mobil, Penny Mobil, and KAUFLAND MOBIL. Annualised that is €116.87. The cheapest GB-per-euro is the congstar Jahrespaket at €100 for 240 GB (€0.42 per GB). The cheapest monthly-billed option is fraenk at €10/month for 20 GB.

Source: Operator tariff pages (fraenk.de, congstar.de, norma-connect.de, ja-mobil.de, pennymobil.de, kaufland-mobil.de, telekom.de), verified May 2026

The €8.99/4w discount-supermarket cluster is functionally one product sold under four labels. Underneath it is the Telekom MVNO-Service GmbH, the Telekom subsidiary that resells D-Netz capacity to Rewe, Penny, Kaufland, NORMA and similar partners. Picking between them is a question of which checkout you walk past most often, not network quality.

How do congstar, fraenk, and Penny Mobil differ?

Same network · Different speed, billing cycle, channel, and roaming

All three sit on Telekom's D-Netz. The substantive differences are billing cycle (fraenk is true calendar-monthly; congstar and Penny use 4-week cycles — 13 cycles/year, not 12), speed cap (Penny clusters at 50 Mbit/s 5G, congstar/fraenk at 25 Mbit/s), retail channel (fraenk app-only, congstar omnichannel, Penny supermarket-only), and roaming (only fraenk includes Switzerland).

Source: Operator pricing pages, verified May 2026

The "4-week" vs "monthly" distinction quietly matters. A 4-week cycle bills 13 times a year, so a "€10 per 4 weeks" plan is really €130 per year — not €120. fraenk's €10/month annualises to €120 and gives you the same network. Read past the headline price.

Why pick a D-Netz MVNO over Telekom direct?

Same coverage · Big price gap · Modest speed compromise

You pick an MVNO because coverage is identical and the price is roughly 10-20% lower. The MVNO trade-off is on the edges: capped 5G throughput (25-50 Mbit/s instead of 300 Mbit/s), no MagentaMoments perks (no Disney+, no MagentaTV bundling, no music streaming inclusive), and on some brands no VoLTE or VoWiFi at all. For someone who scrolls Instagram and streams HD video, 25-50 Mbit/s is plenty — YouTube HD needs 5 Mbit/s, Netflix HD needs 5 Mbit/s, Spotify needs <1 Mbit/s.

Concrete comparison: Telekom MagentaMobil Prepaid M charges €9.95 per 4 weeks for 20 GB at 300 Mbit/s (annualised €129.35). The same Telekom radio network via NORMA connect, ja!mobil or Penny Mobil costs €8.99 per 4 weeks for 25 GB at 50 Mbit/s (annualised €116.87). You pay €12.48 less per year, get 5 GB more data per cycle, and trade away a speed ceiling you almost never hit on a phone.

• Choose Telekom direct if: you tether a laptop and pull large files over 5G, you want MagentaMoments perks (loyalty discounts on Disney+, ICE Portal, etc.), or you need premium customer service in a Telekom Shop.
• Choose a D-Netz MVNO if: you mostly use your phone for messaging, social, navigation, video at HD or below, and want to pay roughly €10-15 less per year for the same outdoor signal.
• Choose fraenk if: you want app-only sign-up, you cross the Swiss border regularly, and you prefer true monthly billing.

Does D-Netz cover rural Germany better than O2 or Vodafone?

Country-wide LTE · Bayern + Sachsen blackspots · Bundesnetzagentur register

Yes — modestly but consistently. Telekom reports the highest population and territorial 4G/5G coverage of the three German MNOs and tops the connect Netztest "Land" (rural) scoring category every year since the rural/urban split was introduced. The Bundesnetzagentur Funklochkarte (coverage register) shows the smallest white-spot footprint for Telekom, particularly in eastern Bavaria, the Black Forest, the Eifel, and the Mecklenburg lakes.

Source: connect Netztest 2024/2025 (connect.de), Telekom investor relations, Bundesnetzagentur Funklochkarte, verified May 2026

In dense urban areas (Berlin, Munich, Hamburg, Frankfurt, Cologne) the three networks are functionally equivalent — you will not notice the difference between Telekom and O2 on a train platform or in a café. The premium becomes visible on Autobahn segments through low-density Lander (A7 between Wuerzburg and Fulda, A11 east of Berlin, A93 across the Bavarian Forest), in ICE long-distance trains, and inside Alpine valleys. If you commute or holiday outside the metros, the €1-2 monthly premium for D-Netz over an O2 MVNO is the rational call.

How do you activate a D-Netz prepaid SIM?

Required ID · VideoIdent vs PostIdent · First top-up

Activation takes 10-30 minutes. Germany requires identity verification on every prepaid SIM — the Bundesnetzagentur mandate has been enforced since 2017. You need a valid passport or EU/EEA national ID and a working address (Anmeldebescheinigung helpful but not strictly required for prepaid). No SCHUFA credit check is needed.

1. Buy the SIM or download the app. Pick up the starter pack at a supermarket till (NORMA, Rewe, Penny, Kaufland) for €9.99, order online from congstar.de, or install the fraenk app from the App Store / Google Play.
2. Open the activation flow. Scan the QR code printed on the starter pack or open the brand's activation web page. fraenk handles everything inside its app. (takes 2-3 min)
3. Complete VideoIdent or PostIdent. Most brands route you into a VideoIdent session: a short video call with a third-party verifier (IDnow, WebID) who checks your passport and your face on camera. PostIdent — verifying at a Deutsche Post branch — is offered as a fallback. (VideoIdent runs 06:00-23:00, 5-15 min)
4. Top up the starter balance. Prepaid SIMs need a top-up to activate the plan. Pay by credit card, SEPA direct debit, or PayPal. The first cycle begins automatically.
5. Insert the SIM (or scan the eSIM QR). Once VideoIdent is accepted (usually inside the same session), the SIM goes live. Restart the phone if you do not see a "D1" or "Telekom.de" carrier label within 10 minutes.

What's the 5G situation on D-Netz prepaid?

All MVNOs get 5G · Speed cap differs · n78 + DSS

Every D-Netz prepaid brand listed above now includes 5G access at no surcharge — Telekom switched on wholesale 5G for its MVNO partners in stages from 2022 onward, with the final brands (Penny Mobil, ja!mobil, NORMA connect, KAUFLAND MOBIL) all activated by mid-2024. The difference between brands is the maximum download throughput their wholesale agreement allows.

• 50 Mbit/s 5G: NORMA connect S 5G, ja!mobil Smart, Penny Mobil Smart, KAUFLAND MOBIL Smart S 5G — all four discount supermarket brands share this tier.
• 25 Mbit/s 5G: congstar Prepaid Allnet M, congstar Jahrespaket, fraenk — Telekom's own digital brands sit lower because the €10 tier is positioned below the supermarket tier on speed.
• 300 Mbit/s 5G: Telekom MagentaMobil Prepaid (the direct Telekom-branded product). Effectively uncapped within network conditions.
• 5G bands used: Telekom runs 5G on n78 (3.6 GHz mid-band) for capacity, n28 (700 MHz low-band) for rural reach, and DSS on n1 / n3 for fallback coverage. Almost any 5G phone released after 2021 supports the relevant bands.

Speed caps apply only to the radio link — they do not throttle latency, do not block 5G priority class, and do not change coverage. A capped 50 Mbit/s 5G connection still delivers sub-20 ms latency on the Telekom backbone and lets you stream 4K HDR comfortably. If you regularly tether laptops, run gigabit-class file transfers, or use mobile broadband as a home fixed-line replacement, only the direct Telekom prepaid (or a contract plan) makes sense.

How did we rank these D-Netz prepaid SIMs?

Six-dimension scoring · operator-verified data · affiliate-independent

We score every D-Netz prepaid plan on six equally-weighted dimensions: price per GB, 5G speed cap, EU + Switzerland roaming, activation friction (VideoIdent vs PostIdent vs in-store), retail availability, and billing transparency (true monthly vs 4-week cycle). Prices were verified against each operator's public tariff page in May 2026.

Network performance scoring draws on the connect Netztest 2024/2025 (Telekom #1, 968/1,000), Opensignal Germany Q1 2026, and the Bundesnetzagentur Funklochkarte coverage register. We do not commission paid drive-tests — we cite the operator and the independent benchmark side by side.