Oister DK review
Updated September 28, 2026 · NomadCue Editorial Team · Facts checked September 26, 2026
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Our verdict
Oister DK is a Danish budget MVNO whose travel pack suits short trips to the few destinations it covers. A DKK 79 entry price and 3 countries keep it narrow, so travellers heading elsewhere get little from it. Plans work on a carrier plan with 5G and top-ups.
Key facts
- Best for
- Short trips to Thailand, Turkey or the US from Denmark on a budget
- Price from
- DKK 79↗
- Countries covered
- 3↗
- Unlimited data
- No↗
- Reference plan prices
- OiSTER Travel 20 GB: Thailand 79 kr., Turkey 79 kr., US 79 kr. (30 days). Europe: EU data included in subscription, extra data 1 ore/MB. Japan and Mexico: no plan priced.↗
- 5G
- Yes↗
- Fair use policy
- Travel pack valid 30 days or until 20 GB used; outside EU, roaming data is blocked after spending 450 kr; extra EU data 1 ore/MB; permanent roaming counted if mostly used abroad over 4 months↗
- Networks
- 3↗
- Top-ups
- Yes↗
- Seller type
- Mvno↗
- Legal entity
- Hi3G Denmark ApS↗
- Headquarters
- Denmark↗
- Founded
- 2008↗
- Support channels
- Phone, Email, Help-centre↗
- Region
- Regional
- Features
- 5G, Carrier plan
- Pricing model
- Budget
- Audience
- Short trips
- Official website
- oister.dk
Facts checked September 26, 2026, 5 sources
Pros and cons
Pros
- Entry price of DKK 79 for a travel pack covering 3 countries
- 5G on a carrier plan, with top-ups available when EU data runs out
- Support runs on phone, email and help centre
- An MVNO operating since 2008 in Denmark
Cons
- Covers 3 countries, far below Zwitchy at 200
- No unlimited data, with the travel pack capped by a fair use policy
- The travel pack validity window is short, and heavy use is counted as permanent roaming
Who it suits
- Travellers on short trips to the destinations the travel pack names
- People who want a Danish support contact in their own language
- Budget users who will top up rather than buy a large allowance
Who should look elsewhere
- Anyone visiting many countries, who is better served by Zwitchy at 200 countries
- Travellers wanting unlimited data, since this brand has none
- Long stays abroad, where the fair use policy counts heavy use as permanent roaming
Where it works
The travel pack reaches 3 countries, with reference pricing for Thailand, Turkey and the US, while Europe is handled as a regional plan under regional. It runs on 3 networks with 5G. That footprint is a short-trip shape rather than a global one, and it sits well below Zwitchy at 200 countries.
How it compares on our data
On our data this brand sits near the bottom of the tables: 250 of 303 for countries covered and 227 of 313 on price from. The coverage ranking is the weaker of the two, and the narrow destination list is the reason to look elsewhere for a trip that crosses more than a few regions.
How Oister DK compares
8.6 vs 9.3
8.6 vs 9.3
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8.6 vs 8.6
8.6 vs 8.6
Where Oister DK is available
- Available
- Denmark
Countries from the brand (Source, checked September 26, 2026)
Frequently asked questions
What does an Oister DK travel pack cost?+
Travel packs start at DKK 79, with reference pricing listing the same figure for Thailand, Turkey and the US. A 3 network carrier plan sits underneath, and 5G is included. Buyers on a tighter budget can compare the $0.99 starting point elsewhere.
How many countries does Oister DK cover?+
The pack covers 3 countries, with Thailand, Turkey and the US among the named destinations and Europe handled as a regional plan. That is a short list, so anyone crossing several regions should look at Zwitchy at 200 countries instead.
Is Oister DK data unlimited?+
Unlimited data is not offered, and the travel pack runs under a fair use policy. The pack stays valid for a set window or until a data cap is used, then roaming outside the EU is blocked once a spending limit is reached. Extra data inside the EU is billed per megabyte.
What happens if I use the pack heavily?+
The fair use policy limits the travel pack to a set validity window or a data cap, and blocks roaming data outside the EU after a spending limit. Data used mostly abroad over several months counts as permanent roaming. Light use on a short trip stays well inside those limits.
Who runs Oister DK and what kind of company is it?+
Oister DK is an MVNO based in Denmark, trading as Hi3G Denmark ApS, and it has operated since 2008. It works as a budget provider on a carrier plan rather than as a marketplace of resellers. Support is handled through phone, email and help centre.
Can I top up data while travelling?+
Top-ups are available, which helps when a traveller needs more EU data than the subscription includes. Extra data in the EU is charged per megabyte, and roaming outside the EU is capped by the fair use policy. Prices for a few destinations are not published, so check before departure.
Does Oister DK work inside Europe?+
Europe is treated as a regional plan under regional, with EU data included in the subscription and extra data billed per megabyte. Outside the EU, roaming data is blocked once a spending limit is spent. A 5G carrier plan on 3 networks covers the in EU experience.
Is Oister DK good for a long trip?+
It suits short trips rather than long stays, since the pack has a limited validity window and a data cap. Heavy use over several months abroad counts as permanent roaming under the fair use policy. Travellers spending months across many countries are better served by Zwitchy at 200 countries.
Sources
- oister.dk checked September 26, 2026
Backs: Legal entity, Support channels
“Copyright © 2026 by OiSTER (Hi3G Denmark ApS). CVR: 26123445”
- oister.dk/hjalp/forbrug/brug-i-eu checked September 26, 2026
Backs: Region, Top-ups
“When your data in the EU is used up, we send you an SMS where you can open for more data. It costs 1 ore/MB”
- oister.dk/hjalp/forbrug/brug-uden-for-eu checked September 26, 2026
Backs: Reference plan prices
“If you travel to Thailand, Turkey and the USA you can get access to 20 GB of data for only 79 kr. by buying OiSTER Travel”
- oister.dk/hjalp/forbrug/oistertravel checked September 26, 2026
Backs: Audience, Countries covered, Fair use policy, Price from, Unlimited data
“OiSTER Travel is valid for 30 days, or as long as the 20 GB of data lasts”
- oister.dk/om-oister checked September 26, 2026
Backs: Features, 5G, Founded, Headquarters, Pricing model, Networks, Seller type
“You get 3's fast and stable 4G and 5G networks”
Compiled from 5 source pages, checked September 26, 2026. We did not open an account.
Not confirmed yet: Price per GB from, Hotspot sharing.