Had a bit of trouble buying Sim with the website. But Jakob from customer service team helped me out a lot and set me up with the preferred number and mobile subscription. He even helped out for esim... See more
Company replied
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All in all, I am satisfied by the service and the price. It's a quite affordable solution. However, I subscribe for a year, automatic payments every month, no problem. I cancelled my subscript... See more
Company replied
I received a call and was internet for home from Oister. Prices were looking good and we agreed that start date will be 1st of August when binding period with my current internet provider ends. They... See more
Company replied
I must apologize to Oister for my previous posts. The service is really excellent, and my mistake was that I abandoned the 5G router and used a regular one, designed only for 4G. Yes, I switched to an... See more
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Company details
About OiSTER
Written by the company
OiSTER er et lavprisselskab med fokus på mobiltelefoni og mobilt bredbånd. Grundlaget for OiSTER har altid været at gøre det nemt og billigt for OiSTERs kunder. Det forsøger vi konstant at leve op til, hvorfor vi er stolte af vores slogan ’Bedst til prisen’.
Mobilt Bredbånd hos OiSTER:
OiSTERs mobile bredbånd er den bedste lavpris løsning på trådløst internet, som du kan tage med dig overalt i Danmark. Vi kalder det Danmarks nemmeste internet, fordi det er nemt og hurtigt at installere. Desuden benytter vi 3s prisvindende netværk.
Mobiltelefoni hos OiSTER:
OiSTER blev først kendt for at levere Danmarks bedste mobile bredbånd til prisen. Det er den samme tankegang, der danner grundlaget for mobiltelefoni hos OiSTER, nemlig at du får mobiltelefoni på landets bedste mobilnetværk - nemt, enkelt, overskueligt og ikke mindst til en konkurrencedygtig pris.
Grundidéen for OiSTER er, at dit mobilabonnement er gennemskueligt og uden binding. På oister.dk kan du nemt følge dit forbrug og eventuelt ændre dit mobilabonnement, hvis dine behov ændrer sig.
Mobilt Bredbånd hos OiSTER:
OiSTERs mobile bredbånd er den bedste lavpris løsning på trådløst internet, som du kan tage med dig overalt i Danmark. Vi kalder det Danmarks nemmeste internet, fordi det er nemt og hurtigt at installere. Desuden benytter vi 3s prisvindende netværk.
Mobiltelefoni hos OiSTER:
OiSTER blev først kendt for at levere Danmarks bedste mobile bredbånd til prisen. Det er den samme tankegang, der danner grundlaget for mobiltelefoni hos OiSTER, nemlig at du får mobiltelefoni på landets bedste mobilnetværk - nemt, enkelt, overskueligt og ikke mindst til en konkurrencedygtig pris.
Grundidéen for OiSTER er, at dit mobilabonnement er gennemskueligt og uden binding. På oister.dk kan du nemt følge dit forbrug og eventuelt ændre dit mobilabonnement, hvis dine behov ændrer sig.
OiSTER
Written by the company
Contact info
Fadet 4, 1799, København V, Denmark
- 70313070
- kundeservice@oister.dk
- www.oister.dk
4.1
Great
29K reviews
Asks customers to review
This company invites their customers to review, whether positive or negative
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Everything set up online in 1 hour
I could do everything online and up and running on my phone in one day.
31 August 2026
May use AI-assist with repliesRead more
At Trustpilot, it's all about human content. This business can also access our AI-assisted response tool which helps them draft replies.
Isn't it a fraud?
All in all, I am satisfied by the service and the price. It's a quite affordable solution. However, I subscribe for a year, automatic payments every month, no problem.
I cancelled my subscription four days ago, and now the company suddenly decide to charge me for three months because the payment for this month "may have been refused by the bank". Which is just a lie, I checked.
That's extortion. Tried to called (from abroad), nobody picked. Send an email (with a very difficult address to find). Lot price: low customer service and immoral (illegal?) practices when you leave.
Enjoy.
1 September 2026
Unprompted review
Reply from OiSTER
Hi
Thank you for taking the time to share your experience. We appreciate that you have generally been satisfied with both the service and the price, which makes it even more disappointing to read that your experience changed when ending your subscription.
We understand that unexpected charges and difficulties getting in touch can create frustration and leave a negative impression. We would very much like to learn more about your situation and better understand what led to this experience.
Please feel free to contact us at trustpilot@oister.dk with more details, and we will be happy to take a closer look at your case.
Best regards
Isabella
God service
27 August 2026
Reply from OiSTER
Hej
Tusind tak for din anmeldelse! Vi er glade for at se din positive bedømmelse og håber, at du fortsat bliver tilfreds med din oplevelse hos os 😊
De bedste hilsner
Rosalina
Reply from OiSTER
Hej
Tak for din anmeldelse! Vi er glade for at høre, at du har haft en rigtig god oplevelse med vores service 😊
De bedste hilsner
Rosalina
Fine experience!
Fine experience!
I really liked oyster, i changed it only for the high tariff for even Eu calls!
2 March 2026
Reply from OiSTER
Hi
Thank you so much for your review! We’re really happy to hear you had a good experience with us, even though you decided to switch because of the cost of EU calls. We truly appreciate your feedback and hope you might return to us in the future.☺️
Best regards
Nora
Been using Oister for years
Been using Oister for years! Highly recommended!
Thank you Oister
17 August 2026
Reply from OiSTER
Hi,
Thank you so much for your review. We’re thrilled to hear that you’ve been with us for years and are happy with the experience 😊 It really means a lot to us!
Best regards,
Cecilie
Customer service is not quantitative.I…
Customer service is not quantitative.I had a problem but a price but instead of finding a suitable solution for both parties,I justified.I bought a subscription for 219 with a gift phone but only a week later they return to make the offer itself but at the price of 199 kronor I felt unfair and when I wrote to them they were bought at this price unfortunately they were not professionals
14 July 2026
Reply from OiSTER
Hi,
Thank you for taking the time to share your experience.
We're sorry to hear that your experience left you feeling disappointed. We understand that it can be frustrating when a promotion changes shortly after you have made a purchase, and that this affected your overall impression of both the offer and the dialogue you had with us.
We would very much like to learn more about your experience and better understand what led to this situation. Please feel free to contact us at trustpilot@oister.dk so we can review your feedback in more detail.
Best regards,
Toto
I placed an order for 4 products
I placed an order for 4 products, but only 1 arrived in the package. To make matters worse, OiSTER is demanding full payment for all 4 items!
I contacted their customer support to get this sorted out, but they are doing absolutely nothing to resolve the problem or fix their mistake. Charging customers for items they never delivered and refusing to take responsibility is completely unacceptable.
Extremely poor experience. Avoid them if you want to save yourself the stress and headache.
7 August 2026
Unprompted review
Reply from OiSTER
Hi Rasmus,
Thank you for your review. We are sorry to hear about your experience, and we completely understand that it has caused considerable frustration. This is certainly not the experience we want our customers to have.
You are very welcome to contact us at trustpilot@oister.dk with your details, and we will be happy to investigate the matter further.
Best regards,
Rosalina
Reply from OiSTER
Hej Juliet
Tak for din anmeldelse. Din feedback betyder meget for os. 😊
De bedste hilsner
Toto
Lost the fun and the human touch
I have been an Oister customer for 4 years. It was good in the beginning, and my current review doens't reflect that early period.
But lately, they have lost their relationship with their customers. They've turned into just another network service provider that really can't be distinguished from any of the others. Their customer service is cold and potentially just AI.
14 July 2026
Unprompted review
Reply from OiSTER
Hej
Tak fordi du deler din oplevelse med os. Vi forstår godt, at det kan være skuffende, hvis du oplever, at kontakten og servicen ikke længere føles nærværende, som den gjorde tidligere – det er bestemt ikke vores intention.
Vi vil meget gerne høre mere om dine oplevelser, så vi kan lære af din feedback og se, hvordan vi kan blive bedre. Du er meget velkommen til at skrive til os på trustpilot@oister.dk.
De bedste hilsner
Nora
If you are in trouble, don't expect any support
Have a problem with my account. Tried to call them, but their line is always busy. Wrote to support more than a week ago, but never got a reply. Absolute rubbish provider!
3 July 2026
Unprompted review
Reply from OiSTER
Hi
Thank you for sharing your experience with us. We completely understand how frustrating it must be when you can’t get through on the phone and have to wait a long time for a reply – that’s definitely not the experience we want to provide.
We’d really like to learn more about your situation and assist you further, so please feel free to reach out to us at trustpilot@oister.dk.
Best regards
Nora
Exemplary Service Support
Had a bit of trouble buying Sim with the website. But Jakob from customer service team helped me out a lot and set me up with the preferred number and mobile subscription. He even helped out for esim configuration also. 5 star review for the service 😎
2 July 2026
Reply from OiSTER
Hi
Thank you so much for your review! We’re really happy to hear that Jakob was able to assist you with setting up your number, subscription, and eSIM configuration. We’ll make sure to pass your praise on to him – it truly means a lot to us 🤗🤗
Best regards
Nora
Quikly solution
28 June 2026
Reply from OiSTER
Hej
Tusind tak for din anmeldelse! Det er dejligt at høre, at du oplevede en hurtig løsning – lige præcis sådan ønsker vi, det skal være 😊
De bedste hilsner
Nora
I haven't received my SIM card. Dismal service.
I haven't received my SIM card. The AI keeps referring me to the hotline.
I want to speak to a support agent, but I just end up in the queue. There is no email address for submitting my issue.
I can't even cancel the order this way. Dismal service.
20 June 2026
Reply from OiSTER
Hi Michael,
Thank you for your review. It sounds really frustrating to be waiting for your SIM card while also finding it difficult to reach us. You’re very welcome to write to us at trustpilot@oister.dk so we can take a closer look at your case and find a solution.
Best regards,
Cecilie
Great service for affordable money
22 June 2026
Reply from OiSTER
Hej David
Tusind tak for din anmeldelse. Hvor er det skønt at høre, at du oplever både god service og en pris, der giver mening for dig. 😊
De bedste hilsner
Toto
I received a call and was internet for…
I received a call and was internet for home from Oister. Prices were looking good and we agreed that start date will be 1st of August when binding period with my current internet provider ends. They send me modem, all was good but now I received a message that my sim activated by itself after 45 days. And I didn’t even unpacked router. Called them and they said they cannot do anything. Luckily I am in 14 days return period so I can just regret it and send modem back and hope I will be refunded. Very unprofessional approach to get more customers.
UPDATE: I was contacted by Oister and everything was sorted. I was charged small amount and refunded back. Agreed that they will send a new modem before August with same conditions as it was before. Happy that they care about customers.
21 June 2026
Unprompted review
Reply from OiSTER
Hi,
Thank you for sharing your experience with us.
We understand how frustrating it must feel to agree on a start date and then experience an activation earlier than expected, especially when you haven't even unpacked the equipment.
We’d really like to look into what happened here and learn from this situation. Please email us at trustpilot@oister.dk with your details so we can review the case and assist you further.
Best regards
Toto
Not clear to me if free sms are working…
Not clear to me if free sms are working for eu numbers too, as theoritically work for calls.
17 June 2026
Reply from OiSTER
Hi
Thank you for your review and for sharing your concern. It sounds like you are unsure whether free SMS also applies to EU numbers in the same way as calls.
Please feel free to email us at trustpilot@oister.dk, and we’ll clarify this for you so you have the correct information.
Best regards
Toto
I’m extremely happy with my experience…
I’m extremely happy with my experience with Oister. I called yesterday to sign up for their 5G internet service, and to my surprise, the router arrived today. The setup was quick and easy, and my Wi-Fi was up and running within minutes.
The whole process was smooth from start to finish. The customer service was friendly, professional, and very helpful in answering my questions. Fast delivery, easy installation, and a great internet connection — exactly what I was looking for.
A big thank you to the team at Oister for exceeding my expectations. I highly recommend their 5G internet service to anyone looking for reliable internet and excellent customer support.
⭐⭐⭐⭐⭐ 5/5 – Keep up the great work
17 June 2026
Reply from OiSTER
Hi,
Wow, what an amazing review to receive – thank you so much for sharing your experience with us! We’re truly delighted to hear that the entire process, from ordering to setup, was quick and seamless, and that you’re already enjoying a stable connection.
It means a lot to us that you highlighted the fast delivery, easy installation, and the great experience with our customer service. We’ll definitely pass your kind words on to the team – they’ll be proud to know that their efforts made a difference for you.
Thank you for recommending us and for taking the time to write such a detailed review. We truly appreciate your trust and look forward to having you as our customer 😊
Best regards
Nora
Reply from OiSTER
Hej
Vi sætter stor pris på din anmeldelse! Det glæder os at høre, at du oplever servicen som god – det betyder rigtig meget for os 😊
De bedste hilsner
Nora
Super fast and super efficient!
5 June 2026
Reply from OiSTER
Hi Jasmin
Thank you so much for your positive review.
We’re thrilled to hear that you found our service both fast and efficient – that’s exactly what we aim to provide. 😊
Best regards
Toto
OiSTER Customer Service
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