fraenk Reviewed (2026): App-First D-Netz at €10/Month
What is the fraenk plan?
fraenk sells exactly one mobile tariff. Here's what you get:
| Feature | Value |
|---|---|
| Price | €10/month (monthly billed, not 4-week) |
| Data | 20 GB/month, can grow via referral mechanic |
| Calls/SMS | Allnet (unlimited German numbers) |
| Network | "Bestes D-Netz" (Telekom) with 5G |
| EU roaming | Included, plus Switzerland |
| Contract term | Monthly cancellable |
| Signup | App-only (iOS / Android) |
| Annual cost | €120/year |
Why is Switzerland-inclusive roaming a big deal?
Switzerland is not in the EU, so "Roam Like at Home" rules don't apply. Most German prepaid and contract tariffs charge Swiss zone-1 rates (typically €0.49-0.99/MB) for any data used in Switzerland. fraenk includes Switzerland in standard roaming, alongside Telekom and a small number of others. For Berlin or Munich residents who frequently visit Zurich, Basel, or Geneva, this saves real money — one weekend in Switzerland on a CallYa S without Switzerland add-on can easily cost €30+ in extra data.
Frequently asked questions
How does fraenk compare to congstar?
Both run on Telekom. congstar M is €10/4w for 25 GB (annualised €130/year), with prepaid signup. fraenk is €10/month for 20 GB (annualised €120/year), with app-only signup and Switzerland included. fraenk is slightly cheaper per year and adds Switzerland; congstar gives you 5 GB more per cycle and supermarket retail availability.
Can I sign up for fraenk without the app?
No. fraenk is intentionally app-only. You sign up, activate, manage, and cancel inside the iOS or Android app. The website is marketing-only with no signup form. This is the model: zero tariff complexity, no website wizardry.
Is fraenk really on the Telekom network?
Yes. fraenk is owned by Telekom and runs on Telekom cell sites with 5G. The homepage states "bestes D-Netz". Signal coverage is identical to Telekom-branded plans. Speed cap is similar to congstar (around 25 Mbit/s) rather than uncapped Telekom prepaid.
Does the fraenk referral mechanic actually increase my data?
Yes. Inviting a friend who signs up gives you both extra GB on top of your 20 GB baseline. The exact bonus changes with promotions; check the app for current terms. Heavy referrers can hit 30-40 GB/month on the €10 plan.