I was using oister many years but now disappointed they charging so much money, I didnt even get a notice that they are going to charge much, or raised their abonement just like that take the money au... See more
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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
Oister has been great, quick and easy to switch to their service via digital sim card, it can be done in an instant, which is great if you have someone stalking your phone.
Company replied
Affordable, practical and it just works, even in long term trips in the EU outside DK, my OiSTER account holds strong, great coverage all over. I've been a customer since November 2019. I once switche... 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
28K reviews
Asks customers to review
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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.
March 20, 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.
March 10, 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)
March 17, 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.
January 31, 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.
January 2, 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.
December 28, 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
The worst phone service available in…
The worst phone service available in Denmark. They charge for non existent data usage and add a lot of fines on top of it. I just came back from 2 week of holiday where I was using a local e-sim (with oister turned off) to find out they had turned off my number because of "unpaid data usage abroad". When asking customer service to provide what data usage had been done they couldn't provide any documentation. An absolute rip off and incapable customer service. Wouldn't even wish this phone company on my worst enemy. Avoid at all costs.
December 2, 2024
Unprompted review
Reply from OiSTER
Dear Lotta
Thank you for your review.
I'm sorry to read about your experience with spending abroad.
I see that you have been in contact with our customer service in the meantime to get the matter resolved.
Best regards
Emilie
TOP UP ..RIP OFF
I have received a mail from Oister,stating a TOP UP ( they say top up ) I say RIP OFF ! of 100,00dkr...after having connected via sim card the 18th Nov,2024 in the morning, I received a amount due to Oister in the afternnon .. ( I have checked my account , they have accredited their account with 153,16 dkr...then I get another amount to be payed ! 135,70 asap or a 100,00dkr fine for NOT PAYING , this is after 48 hours of sim card being placed into my mobile ... I remember a song from a group called Frankie goes to Hollywood " The World is your OYSTER " Oister dk is more like a CLAM (musling) SCAM !
November 20, 2024
Unprompted review
Reply from OiSTER
Dear Mark
Thank you for your review.
I'm sorry to read about your experience with payment and Top up with us.
I see that you have since been in contact with my colleague regarding this.
Best regards
Emilie
Scam - terrible terrible service and never ever use
Scam - ordered two e-sims and they never worked. Do not ever order from here - have been charged for 6 months of use without being able to use, and being forced to pay.
Unhelpful and very rude customer service
October 15, 2024
Unprompted review
Reply from OiSTER
Dear Nuala,
Thank you for your review.
We’re truly sorry to hear about your negative experience. This is not the level of service we aim to provide.
We apologize for the issues you’ve had with the e-SIMs and for the difficulties in getting them to work. We also sincerely regret that our customer service did not meet your expectations.
If you want assistance i will be glad to help you. If you can contact me at Trustpilot@oister.dk i will look further into this matter.
Best regards,
Emilie
very very bad connection
very very bad connection. I was using it in Brøndby very bad experience. They said its 5G network but was not even 2G. and you can’t even change it because you have 6 months binding. So for 6 months i sufdered. Called customer servise many times and tried many things, didn’t help.
September 12, 2024
Unprompted review
Reply from OiSTER
Kære Arafatul
Thank you for your review.
I’m really sorry to hear about the issues you experienced with your connection in Brøndby. It’s definitely not the kind of service we aim to provide, and I completely understand how frustrating it must have been to deal with poor network quality, especially when you were expecting a 5G experience.
When it comes to coverage, there will be areas where we don't cover quite as wide. There can be various factors that affect this, such as terrain, a lower number of masts or the distance to the mast.
We hope to provide you with better coverage in the future.
Best regards
Emilie
VERY UNPROFESSIONAL SERVICE
I AM A NEW CUSTOMER IN OISTER. I HAVE NOT RECEIVED MY SIMCARDS WHEN I SHOULD HAVE. I SPENT MONEY TO CALL AND WAITED 35 MINUTES. NICE PERSON ANSWERED AND HE SENT ME THE 2 SIMCARDS I SHOULD HAVE RECEIVED BUT WERE NOT SENT.
I RECEIVED THE 2 SIMCARDS 2 DAYS LATER BUT HAD TO BUY A PHONE CARD IN THE MEANTIME BECAUSE BOTH MY PHONES DID NOT WORK BECAUSE OF NO SIMCARD.
TODAY, I PUT THE SIMCARDS IN MY PHONES BUT THEY ARE NOT ACTIVATED.
I`M ASKED TO ACTIVATED THEM BUT I CAN´T BECAUSE I DO NOT HAVE A PASSWORD TO ACCESS MY ERHVERVS ACCOUNT. I TRY TO OPRET A KODEORD FOR OISTER BUT THE PAGE DOES NOT WORK. IT REPETEDLY SAYS THERE´S AN ERROR, YOU SHOULD CONTACT KUNDERSERVICE.
I CANT AGAIN BECAUSE I DO NOT HAVE A PROPER PHONE CARD. SO, I BUY A NEW ONE BUT I STILL CAN´T CONTACT KUNDERSERVICE BECAUSE IT IS A SPECIAL NUMBER.
I SPENT 4 HOURS TODAY TO GET BOTH MY SIMCARDS ACTIVATED BUT THEY STILL DO NOT WORK. I WROTE A MAIL FROM THE WEBSITE IT SAYS WE WILL ANSWER WITHIN 2 DAYS. i WROTE TO GET MY SIMCARD ACTIVATED AT CA. 15:30 AND IT IS NOW 20:08 AND MY SIMCARDS ARE STILL NOT ACTIVATED!!!
THIS IS UNBELIEVABLE! i CAN´T CALL AND I CAN´T BE REACHED BECAUSE MY PHONES DO NOT WORK.
THIS IS VERY UNPROFESSIONAL!!!
October 7, 2024
Unprompted review
Reply from OiSTER
Dear Nadia
Thank you for your review.
I sincerely apologize for the inconvenience you’ve encountered as a new customer, and I understand your frustration with the delays and issues surrounding your SIM cards.
I’m sorry to hear about the long wait time on the phone, the delays in receiving your SIM cards, and the challenges with activating them. This is certainly not the service we aim to provide, and I apologize for the difficulties you've faced in trying to get support, especially with the password setup and contacting our customer service.
I can see in the meantime that the issue has been solved during this case.
Again i am very sorry for your experience with us.
Best regards
Emilie
My experience with oister
I was a customer for a long time. So I think I can write my review on Oister.
Pros
It's cheap.
Easy to set up
Cons
The customer service is awful. They make you wait for 30 - 45 minutes before answering calls
They are untrained and the phone call is way longer than it needs to be
The internet service cuts out alot of times. I live in Aarhus and it usually drops out 1-2 times a day.
Cut bandwidth during evenings, good luck streaming a Netflix show because if you are watching after 22 they cut the bandwidth down to less than 500kbs
They use cheap tricks and bad user interfaces to make it hard for canceling subscriptions. I've dealt with accidentally clicking on cancel a cancellation of subscription when trying to navigate their platform.
Don't settle for the cheap option. please research other options there are a whole lot. Choose someplace that has experts on their team, value customer service. Has 100% uptime. It usually cost just a little more but you get so much in return
October 7, 2024
Unprompted review
Reply from OiSTER
Dear Daniel
That you for your review.
Thank you for sharing your honest feedback after being a long-term customer.
While we're glad to hear you found our service affordable and easy to set up, I’m truly sorry to hear about the negative experiences you’ve had with our customer service, internet stability, and platform usability.
I also apologize for the challenges you encountered when navigating our platform, particularly regarding canceling subscriptions.
Thank you for sharing your experience with us. We will of course take this into account for future considerations.
Best regards
Emilie
Poor customer service at Telia.dk
After experiencing poor customer service, network speed issues, and several other problems with Telia, I decided to switch to a different mobile operator. I’m really glad I chose Oister because I haven’t had any issues with network speed since then. Their customer service is always available, respectful, and responsive to any questions or concerns.
February 1, 2024
Unprompted review
Reply from OiSTER
Dear Umid
Thank you so much for your kind review!
We're thrilled to hear that you made the switch to Oister and have had a positive experience with our network speed and customer service.
Providing a reliable connection and responsive support is something we always strive for, so it's wonderful to know we're meeting your expectations.
Thank you for reviewing us.
I wish you a wonderful day.
Best regards
Emilie
Very bad connection
Very bad connection! Writing this comment using my data cuz the internet is super slow. Will unsubscribe asap!
September 9, 2024
Unprompted review
Reply from OiSTER
Dear Sama,
Thank you for your review.
I’m really sorry to hear that you’re experiencing such slow internet speeds. This is definitely not the experience we want for our customers.
We’d like to help resolve this issue, so if you can contact us at trustpilot@oister.dk, can we look further into this matter.
Best regards
Emilie
Only good experiences
Only good experiences, just hate that they do not have an app and that I have to log in with MitID all the time. It becomes quite a hassle to keep up with data usage etc
September 5, 2024
Unprompted review
Reply from OiSTER
Dear Isabel
Thank you for your review.
We're glad to hear that you've had good experiences with our service.
We understand your frustration with the lack of an app and the frequent need to log in with MitID. Your feedback is valuable, and we are continuously looking for ways to improve our customer experience.
I will of course take it to the appropriate department for future consideration.
Best regards
Emilie
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