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Oister is a Danish telecommunications company renowned for offering affordable mobile subscriptions, mobile broadband, and a selection of smartphones. Launched in 2008 as a brand under Hi3G Denmark ApS (part of the CK Hutchison Holdings group), Oister aims to provide simple, transparent, and budget-friendly mobile solutions to Danish consumers. They operate as a mobile virtual network operator (MVNO) primarily utilizing 3's network infrastructure in Denmark, focusing on a digital-first approach with strong online sales and customer service channels.
The Copenhagen headquarters is the operational core for Oister, overseeing marketing, customer service strategy, product development, and coordination with the 3 Denmark network.
The office is part of Hi3G Denmark's modern telecommunications facilities, designed for collaboration and technological innovation. Specific architectural details are not publicly emphasized for the Oister brand itself.
Oister fosters a customer-centric and agile work culture, focusing on delivering simple, affordable mobile solutions. Employees likely experience a dynamic environment within the larger Hi3G and CK Hutchison group, valuing efficiency and innovation.
This headquarters is pivotal for Oister's market positioning and operations in Denmark, allowing it to leverage the resources of Hi3G to compete effectively as a value-driven mobile service provider.
Oister's operations are primarily focused on the Danish market. As a brand of Hi3G Denmark ApS, which is part of CK Hutchison Holdings, it benefits from the global expertise and infrastructure of its parent companies, but Oister itself operates as a national Danish telecommunications provider.
Scandiagade 8
København SV
Region Hovedstaden
Denmark
Address: N/A (Distributed retail and online presence)
To ensure accessibility of Oister's services and products to customers throughout Denmark, leveraging partner networks and digital channels.
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As of April 2025, OiSTER' leadership includes:
OiSTER has been backed by several prominent investors over the years, including:
Information regarding specific executive new hires or departures directly within the Oister brand or at the top C-suite level of Hi3G Denmark has not been widely publicized in the last 12 months. The leadership team appears to maintain stability.
Discover the tools OiSTER uses. Highperformr reveals the technologies powering your target accounts — helping your sales, marketing, and GTM teams prioritize smarter and close faster.
Oister's email communication, especially customer-facing, typically uses the @oister.dk domain. Internal communications and corporate roles within its parent company, Hi3G Denmark, might use @3.dk. Common professional email patterns such as [first_initial][last_name] or [first_name].[last_name] are expected.
[first_initial][last_name]@oister.dk (e.g., jnielsen@oister.dk) or [first_name].[last_name]@oister.dk (e.g., jens.nielsen@oister.dk). Similar formats likely apply for @3.dk.
Format
kundeservice@oister.dk
Example
80%
Success rate
Oister Presse • May 2, 2024
Oister has once again been recognized for its outstanding customer service, winning the 'Best Customer Service' award at the Loyalty Awards 2024. This highlights their continued commitment to providing excellent support to their customers in Denmark....more
GlobeNewswire • March 21, 2024
CK Hutchison Holdings reported its 2023 annual results, detailing the performance of its various divisions, including the 3 Group. The report indicated continued activity in the telecommunications sector, with 3 Group Europe showing a steady customer base and focus on 5G expansion, which indirectly impacts Oister's network capabilities and market strategy in Denmark....more
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