Updated September 28, 2026 · NomadCue Editorial Team
1&1 (1und1) vs Boost Mobile AU
1&1 (1und1)
Higher score in this comparison
Boost Mobile AU
1&1 (1und1) vs Boost Mobile AU: the differences
| Compare | 1&1 (1und1)ReviewSee alternativesSee alternatives | Boost Mobile AUReviewSee alternativesSee alternatives |
|---|---|---|
| Price from | €9.99 | A$20 |
| Countries covered | 33 | 42Higher |
| Unlimited data | YesHas it | No |
| Fair use policy | Roaming fair use: use must show ordinary residence in Germany, otherwise roaming surcharges apply; after the plan's high-speed volume is used up data continues unlimited at 64 kbit/s; Unlimited XL includes 61.2 GB/month in the EU, then 1.31 EUR/GB | Pack expires 3, 7 or 14 days after purchase; unused data, calls and texts are lost, no rollover |
| Networks | 1&1 Mobilfunknetz (Open RAN), Telefonica Germany (national roaming) | Telstra |
| Seller type | Carrier | Mvno |
| Reference plan prices | Not confirmed | One roaming price for all 42 countries incl. USA, UK, Japan, Thailand, Turkey and Europe (France, Germany, Italy, Netherlands, Spain, etc): Small 2GB AUD 20 / 3 days, Medium 5GB AUD 30 / 7 days, Large 7GB AUD 40 / 14 days; Mexico not included |
| 10 GB in Europe | €9.99 | Not confirmed |
Same on both: 5G (Yes), Top-ups (Yes).
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Key differences
- 1&1 (1und1) scores higher overall: 9.2 vs 8.8.
- Countries covered is higher at Boost Mobile AU: 42 vs 33.
- Unlimited data: only 1&1 (1und1).
- Networks: only 1&1 (1und1) offers 1&1 Mobilfunknetz (Open RAN), Telefonica Germany (national roaming).
- Networks: only Boost Mobile AU offers Telstra.
- Support channels: only 1&1 (1und1) offers Email.
- Support channels: only Boost Mobile AU offers Community.
- Founded is lower at 1&1 (1und1): 1988 vs 2000.
- Features: only 1&1 (1und1) offers Unlimited data.
Our verdict on each
1&1 (1und1)
1und1 is a German mobile carrier, not a travel eSIM, so it suits readers who live in Germany and want a home plan that still works abroad. Its flat rate adds unlimited data, subject to a fair use policy, plus 5G and instant activation, and roaming spans 33 countries from €9.99.
Boost Mobile AU
Boost Mobile AU suits a short trip that stays inside a single roaming zone, where one price covers the USA, UK, Japan, Thailand, Turkey and Europe. Packs start at AUD 20 and run on the Telstra network, so setup happens inside your own carrier plan rather than on a marketplace.
Score breakdown
| Area | 1&1 (1und1) | Boost Mobile AU |
|---|---|---|
| Cost | 9.0Higher | 8.5 |
| Offer | 9.1HigherFlat rate bundles unlimited data, 5G and instant activation from €9.99, and top-ups are available. | 8.9 |
| Trust | 9.8Higher | 9.1 |
Where they rank in our lists
| Ranking | 1&1 (1und1) | Boost Mobile AU |
|---|---|---|
| Travel SIMs and eSIMs | 156 of 926 | 351 of 926 |
| Travel eSIMs | 164 of 918 | 357 of 918 |
Where each is licensed and available
Additional countries for 1&1 (1und1): 1. Additional countries for Boost Mobile AU: 1.
What we checked
1&1 (1und1)
- 1und1.de: 7 facts, checked September 26, 2026
- mobile.1und1.de: 6 facts, checked September 26, 2026
- unternehmen.1und1.de: 3 facts, checked September 26, 2026
Boost Mobile AU
- boost.com.au: 12 facts, checked September 26, 2026
- en.wikipedia.org: 3 facts, checked September 26, 2026
Every fact side by side
| Fact | 1&1 (1und1) | Boost Mobile AU |
|---|---|---|
| Region | Regional | Not confirmed |
| Features | Unlimited data, 5G, Instant activation, Carrier planCovers more | 5G, Instant activation, Carrier plan |
| Audience | Short trip | Short trip |
| Legal entity | 1&1 Telecommunication SE | Telstra Limited ABN 64 086 174 781 (trading as Boost Mobile) |
| Headquarters | Germany | Australia |
| Founded | 1988Lower | 2000 |
| Support channels | Email, Chat, Phone, Help centre | Help centre, Chat, Phone, Community |
Where each stands against the rest
| Fact | 1&1 (1und1) | Boost Mobile AU | Median |
|---|---|---|---|
| Countries covered | 33lowest quarter | 42lowest quarter | 120 |
| 10 GB in Europe | €9.99below the median | Not confirmed | €12 |
Median across 492 listed travel providers.
Pros and cons
1&1 (1und1)
Pros
- Unlimited data, 5G and instant activation sit in one flat rate from €9.99, and the fair use policy says what happens after the high-speed volume is used up.
- Support runs on email, chat and phone, so help comes from the carrier itself.
- Top-ups are available, and regional reach suits a short trip away from Germany.
Cons
- Roaming spans 33 countries, well short of Zwitchy at 200.
- The fair use policy requires an ordinary residence in Germany, so the roaming offer does not suit visitors without a German home.
- The €9.99 price sits above the site median of €5, and it is a carrier home plan rather than a travel eSIM.
Boost Mobile AU
Pros
- A single roaming price covers the USA, UK, Japan, Thailand, Turkey and Europe across 42 countries, so the same pack carries a whole itinerary
- Top-ups are available, and the eSIM range lists 5g, instant activation and carrier plan, so a plan is ready as soon as you buy it
- Support covers help centre, chat and phone, the brand has been trading since 2000, and the service runs on the Telstra network
Cons
- The fair use policy is strict: a pack expires after a set period, and unused data, calls and texts are lost
- Unlimited data is not offered, so heavy use simply runs into the cap the pack size sets
- Coverage of 42 countries sits below the eSIM listing median 76, so it is a set of destinations rather than a global one
Who each suits
1&1 (1und1)
Who it suits
- German residents taking short trips who want one plan at home and abroad.
- Travellers who want unlimited data with 5G and instant activation under a single contract.
- Readers who already buy from a German carrier and would rather add roaming than buy a travel pass.
Who should look elsewhere
- Visitors with no German residence, because the fair use policy ties roaming to an ordinary residence in Germany.
- Readers who need broad coverage, who will find more countries at Zwitchy with 200.
- Price-first shoppers, since eSIMGo.is starts at $0.99.
Boost Mobile AU
Who it suits
- Travellers on a short trip whose destinations all sit in the covered set, who want a single price across the whole itinerary
- People who would rather buy a carrier plan with instant activation than pick through a marketplace listing
- Travellers who want a person to call while abroad, since support runs on help centre, chat and phone
Who should look elsewhere
- Anyone whose itinerary includes Mexico, since Reference plan prices leave it out; Zwitchy covers 200 countries for a wider trip
- Buyers chasing the lowest entry price, since eSIMGo.is starts at $0.99
- Long-trip travellers who want weeks of validity, since Boost packs expire after a set period; Zwitchy at 200 countries fits longer itineraries
Current offers
1&1 (1und1)
Current offer
Free trial
Test everything for 30 days - satisfied or money back: 30 days
Cancel within the first 30 days without giving reasons; 1&1 refunds the one-time provisioning fee and the base fee
Source, checked September 26, 2026
First period offer
1&1 All-Net-Flat S 10 GB introductory price: 9.99 EUR/month for 3 months
Entry price for the 10 GB tariff; from the 4th month 14.99 EUR/month
Source, checked September 26, 2026
Bonus
Alt gegen Neu trade-in premium when ordering a new device with a 1&1 tariff: up to 800 EUR, at least 50 EUR
Depending on model and condition of the old device
Source, checked September 26, 2026
Boost Mobile AU
Current offer
First period offer
$39 SIM/eSIM for $13: AUD 13 for the first 28-day recharge instead of AUD 39
Sale ends 5 Oct. Online only, on new activations. eSIM/SIM includes first recharge; ongoing recharges $39. Activate by 2 Nov 2026, remaining recharges by 5 Apr 2027.
Source, checked September 26, 2026
Bonus
6-times the bonus on selected 28 day plans: Bonus data on first 6 recharges (e.g. 60GB instead of 30GB on the $39 plan)
New activations; 60GB on first 6 recharges, 30GB from 7th recharge (105GB then 55GB on the $59 plan, 150GB then 100GB on the $74 plan). Activate by 2 Nov 2026, remaining recharges by 5 Apr 2027.
Source, checked September 26, 2026
First period offer
$300 12-month SIM for $265: AUD 265 instead of AUD 300 for the 12-month expiry SIM (290GB)
Sale ends 28 Sept. Online only, on new activations. Ongoing recharges $300.
Source, checked September 26, 2026
Country by country
| Country | 1&1 (1und1) | Boost Mobile AU |
|---|---|---|
| Australia | No | Yes |
| Germany | Yes | No |
Questions about each
1&1 (1und1)
How much does a 1und1 roaming plan cost?+
Plans start at €9.99, and that price buys the home contract rather than a travel pass. The site median price across the brands listed is €5, so a reader comparing on price alone will find eSIMGo.is cheaper at $0.99.
How many countries does 1und1 roaming cover?+
Roaming spans 33 countries, which is far fewer than Zwitchy at 200. The plan is regional in scope, so a trip to a handful of nearby countries is the realistic use rather than a world tour.
Boost Mobile AU
How much does a Boost Mobile AU roaming pack cost?+
Prices start at AUD 20, and the same price applies across every covered country rather than changing by destination. The allowance and the validity window depend on the size you pick, with small, medium and large packs aimed at different trip lengths.
Which countries are covered?+
42 countries are covered, and the same roaming price works in the USA, UK, Japan, Thailand, Turkey and across Europe, including France, Germany, Italy, the Netherlands and Spain. Mexico is listed as not included, so check the destination list before you rely on it.
Other options to compare
1&1 (1und1)
Boost Mobile AU