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
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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 m... 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
Company replied
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!
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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
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It was a great first experience with…
It was a great first experience with Oister. The person who took care of me during my call has been kind, supporting. He helped me to choose the most suitable abonnement. He was patient. He explained the conditions of the abonnement in a clear manner.
6 June 2025
Reply from OiSTER
Hi Agnes
Thank you so much for sharing your first experience with OiSTER!
We’re thrilled to hear that our colleague was kind, supportive, and took the time to guide you through choosing the right abonnement. Clear communication and patience are values we truly care about, so it’s great to know that came through.
Best regards,
Anne
Reply from OiSTER
Hi Mihaita
Thank you so much for your review!
We're thrilled to hear that you're very satisfied and that our colleague made a great impression. We always aim to provide helpful and friendly service, so it's wonderful to know that it came through.
Best regards,
Anne
Affordable and good service
1 June 2025
Reply from OiSTER
Hi Arco
Thank you so much for your review!
We're glad to hear that you find our service both affordable and good. Your feedback truly means a lot to us.
Best regards Anne
Good initiative
I like the fact that I was called before my current subscription expires and got asked if I wanted to join Oister back.
The agent was very knowledgeable and nice to talk to. He is a super star.
20 May 2025
Reply from OiSTER
Hi Djohn
Thank you so much for your kind review!
We're glad to hear you appreciated the call and that our agent made a great impression. We truly value your trust and are happy to welcome you back to OiSTER.
Please don’t hesitate to reach out if you have any questions or need assistance in the future.
Best regards
Camilla
scamming customers
shitty company that makes its profit off by scamming its users with hidden fees and automatic top offs. stick to a real, trustworthy company. I'm ending my service with them
14 May 2025
Unprompted review
Reply from OiSTER
Hi Kris
We’re truly sorry to hear about your experience. That’s certainly not the impression we want to leave, and we take feedback like this very seriously.
We aim to be fully transparent with our prices and services, including automatic top-ups and any fees, which are clearly described in our terms and conditions. However, if anything has felt unclear or misleading, we sincerely apologize.
We’d really appreciate the chance to look into your case and help clarify or resolve the issue. You’re very welcome to contact us directly at trustpilot@oister.dk, so we can assist you personally.
Best regards
Camilla
Very cool I hope it’s good as well
23 April 2025
Reply from OiSTER
Hej Alexandre
I'm glad you think so! 😊 I hope your experience with OiSTER is just as great as it seems so far. If you need anything or have any questions, feel free to reach out. Enjoy your new service!
Best regards
Camilla
Always great and reliable
Always great and reliable! Thanks. Long term happy customer with multiple SIMs
23 April 2025
Reply from OiSTER
Hi Mircea
Thank you so much for your kind words! 😊
We’re thrilled to hear that you’ve had such a positive experience and that you’ve been a long-term happy customer with multiple SIMs. It means a lot to us to know that we’ve been able to provide you with reliable service over the years!
If you ever need assistance or have any questions in the future, don’t hesitate to reach out – we’re always here to help.
Best regards
Camilla
Reply from OiSTER
Hi Xianli
Thank you for your great review! We're thrilled to hear that your order was delivered so quickly. We strive to provide fast and reliable service, and it's fantastic to know we met your expectations.
If you need anything else, don't hesitate to reach out!
Best regards
Camilla
I subscribed to a new service with eSIM…
I subscribed to a new service with eSIM 2 days ago and still have not received the QR code to activate. I have sent a message to customer service and have not had a reply. Poor service
19 April 2025
Reply from OiSTER
Hi Shannon
Thank you for your message, and we’re sorry to hear you haven’t received your eSIM QR code yet.
We’ve been closed over the Easter holidays, which is why you haven’t received a response earlier – but we're open again today, and ready to help you.
You're very welcome to reach out to our customer service team directly at 70 31 30 70, and we’ll make sure to get your eSIM activated as quickly as possible.
Thanks for your patience, and we look forward to assisting you.
Best regards
Camilla
Reply from OiSTER
Hej Aklilu
Thank you for your review! We're really glad to hear that you found our service trustworthy. It's important to us that our customers feel confident and well taken care of.
If you need any assistance in the future, don't hesitate to reach out!
Best regards
Camilla
Reply from OiSTER
Hej
Tak for din anmeldelse! Vi er glade for, at du er tilfreds! Hvis der er noget, du har brug for hjælp med, er du altid velkommen til at sige til.
Vi rider videre på bølgen – Tak for din tid! Hilsner fra Camilla 🌊🐚
Reply from OiSTER
Hi Esayas
Thank you for your review! We're thrilled to hear that you experienced good service – we always strive to provide the best support.
Best regards
Camilla
Good experience
Good experience, call from Oister employee to offer a deal to come back to the carrier.
20 March 2025
Reply from OiSTER
Hi Ana
Thank you for your review! We're happy to hear that you had a positive experience with the call from the OiSTER representative and the offer to return. We always strive to provide great deals and service, and we appreciate the opportunity to welcome you back.
If you have any questions, we're here to help!
Best Regards Camilla🌊🦪
Reply from OiSTER
Hej Sam
Thank you for your review! We're glad to hear that you found our service fast and good. Providing quick and reliable support is our priority!
If you ever need assistance again, we’re always here to help.
Best regards Camilla 🌊🦀
Reply from OiSTER
Hi Sharon
Thank you so much for your kind words! We're thrilled to hear that you had a great experience with our customer service.
Providing quality support is our top priority, and we’re always here if you need us again.
Best regrads Camilla 🌊🦪
I tried signing up on the website
I tried signing up on the website, but I kept getting an error that the payment was unavailable. Then sent an email about it to the support and it took them a week to get back to me with a manual offer, which led me back to the same payment window, that wasn't working in the firstplace for me.
10 March 2025
Reply from OiSTER
Hi Naatan
I'm really sorry to hear about your frustrating experience with our sign-up process and the delayed response from our support team. That’s definitely not the level of service we strive to provide.
I’d love to help resolve this for you as quickly as possible. Please reach out to me directly at trustpilot@oister.dk, and we’ll look into an alternative way to process your payment and ensure you get set up without further hassle.
We truly appreciate your patience and hope to get this sorted for you soon!
Best regards
Camilla
Their price drops, but if you are an old customer, they will keep your abbonnement at top price
As an old customer, I keep on pay top price for a service that is now offered to new customer for much less (like, at full price, not with the initial discount). Customer service tells me I cannot get those price. Only option is to change phone company and eventually come back to them in the future.
I am gonna cancel my abbonnement at Oister right away. I would say this is so scandalous
UPDATE: the solution they offer is still not satisfying. I accepted while I search for a new company. It is scandalous that the price for the same abbonnement for old customers are 20 dkr per month higher then what new customers can get (Without the classic intro offer)
17 March 2025
Unprompted review
Reply from OiSTER
Hi
Thank you for sharing your experience with us. I understand your concerns, and I have sent you an email with a potential solution that I hope will be of interest to you.
Please take a look when you have the time, and feel free to reach out if you have any questions.
I look forward to your response and hope we can find a good solution together.
Best regards
Camilla
Super Easy!
Super easy to switch to Oister. Cheap subscription and fast delivery. Will 100% recommend to people.
31 January 2025
Unprompted review
Reply from OiSTER
Dear Kartika
Thank you so much for sharing your experience with us here on TrustPilot at OiSTER.
We're happy to hear that moving to us was easy, with a great subscription price. We are also happy that you would recommend us to others.
We hope to have more great experiences with you.
I wish you a very good day.
Best regards
Emilie
I did not receive my SIM card in time…
I did not receive my SIM card in time for the 1st as I was supposed to, which has left me without phone service for almost three days now. When I finally got through to customer service after waiting on hold for 30 minutes, they agreed to send a new SIM card. However, I was told I would need to call again to activate it once it arrived.
When the SIM card arrived, I called again, waited another 30 minutes to speak to an employee, only to be given completely incorrect information. Despite all this, my SIM card is still not activated.
The service has been frustrating and unreliable, and I cannot recommend Oister based on this experience.
2 January 2025
Unprompted review
Reply from OiSTER
Dear Cecilie
Thank you for your review.
I'm sorry to read about your experience with sim card delivery in here.
I have contacted you on the information provided to go further into the matter.
Best regards
Emilie
I would not recommend oister
I would not recommend oister. I recently travelled abroad just to find out oister turned off the roaming (which a month or so before was on). No explanation, just suddenly no roaming.
28 December 2024
Unprompted review
Reply from OiSTER
Dear Guillermo
Thank you for your review.
I am sorry to hear about your experience with your data and roaming abroad.
I have contacted you on your information, to try and solve this matter.
Best regards
Emilie
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