fraenk vs SIMon vs Blau Flex (2026)
Side-by-side
| Feature | fraenk | SIMon mobile | Blau Allnet S Flex |
|---|---|---|---|
| Network | Telekom (D-Netz) | Vodafone | O2/Telefónica |
| Data | 20 GB (referral can raise) | Up to 250 GB portfolio | 20 GB |
| Price | €10/month | Verify current pricing | €7.99/month |
| Annual cost | €120 | Verify | €95.88 |
| 5G | Yes (~25 Mbit/s cap) | Yes (up to 150 Mbit/s) | Yes |
| EU roaming | Included + Switzerland | Included | Included |
| Switzerland | Included | Verify per tariff | Verify per tariff |
| Contract term | Monthly | Monthly or 24-mo | Monthly (Flex) |
| Signup | App-only | Online | Online + O2 channels |
| eSIM | App-led | Verify | Contract eSIM verified |
Verdict
Pick fraenk if…
- You want the simplest single-tariff brand
- You travel to Switzerland regularly
- You want premium D-Netz coverage
- You like app-only signup
Pick SIMon mobile if…
- You want larger data buckets (up to 250 GB)
- You prefer Vodafone over Telekom
- You want faster 5G speed cap (150 Mbit/s)
- Live in major German cities
Pick Blau if…
- You want the cheapest of the three (€7.99/mo)
- O2 coverage works for you (city user)
- You want both contract and prepaid eSIM options
- You're ok with verifying live pricing
Frequently asked questions
Are fraenk, SIMon, and Blau really three different brands?
Yes — three different parent companies and three different networks. fraenk is Telekom-owned (D-Netz); SIMon mobile is Vodafone-owned; Blau is O2/Telefónica-owned. They're flanker brands their parents use to compete on price without diluting the main brand.
Which one has the fastest network?
SIMon mobile on paper — up to 150 Mbit/s on Vodafone with 5G. fraenk caps lower (~25 Mbit/s on Telekom) but Telekom's underlying coverage is more consistent. Blau follows O2's 5G capabilities. For most users (web, social, video), all three are fast enough.
Is monthly-cancellable really better than 24-month?
For most users, yes. Monthly cancellation means you can switch when prices drop or your needs change. The trade-off is no 24-month introductory discount. Heavy users who know they'll stay 2 years can save 30-40% with a 24-month contract from 1&1, sim.de, or winSIM. Most people switch within a year anyway.
Why is fraenk €2 more than Blau but called the "simple" one?
fraenk includes Switzerland in roaming (rare) and runs on the most extensive German network. Blau on O2 doesn't include Switzerland by default. If you take 1-2 Swiss trips per year, the €2/month difference pays back via Swiss roaming savings. If you never go to Switzerland, Blau is the better value.