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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See what reviewers are saying
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.... 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
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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
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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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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.
2 December 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 !
20 November 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
15 October 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.
12 September 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!!!
7 October 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
7 October 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.
1 February 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!
9 September 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
5 September 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
Just got back to oister from CBB…
Just got back to oister from CBB because CBB was robbing me. They’re charging me 10 kr more as gybrer whatever it’s called. And we’re bad when I travel
18 April 2024
Unprompted review
Reply from OiSTER
Dear Rikhard
Thank you for sharing your experience with us!
We're glad to hear that you're back with OiSTER and finding our services more to your satisfaction.
We strive to provide transparent pricing and reliable service, so it's great to know that you’re finding our offerings more suited to your needs.
Again thank you for your review.
I wish you a wonderful day.
Best regards
Emilie
Terrible experience
Takes many days to receive the sim card,
It arrived and plugged it in my phone but didn’t work out of the box
I couldn’t make calls or use internet.
I used an other phone to call them and had to wait for more than 30 minutes to get in touch with Customer support
Very bad start 😔
unfortunately behind this Cheap prices there is a bad service
22 August 2024
Unprompted review
Reply from OiSTER
Dear Kais
Thank you for your review.
We are truly sorry to hear about your negative experience with us. This is definitely not how we want our customers to feel when using our services.
Delays with receiving the SIM card and issues with activation should not occur, and we fully understand your frustration with both the waiting time and the technical problems.
Again i'm very sorry to hear about your experience with us.
Best regards
Emilie
Well ..
Well ... It is not expensive but provided the same quality as others for a vit more money. On top of that ... If you call in Europe you will pay extra. That's just a stretch for me. My old provider was at least as good as them and i have had free calls in Europe.
21 August 2024
Unprompted review
Reply from OiSTER
Dear Sorin
Thank you for your review.
We’re sorry to hear that you feel our service hasn’t met your expectations.
If you are in Denmark and call a foreign number, you will be charged for this.
However, if you are in an EU country and dial a number, you will not be charged for this.
I would love to take a closer look at the matter, so if you would like me to take a closer look, you are welcome to contact me at trustpilot@oister.dk. I will be happy to take a closer look.
Best regards
Emilie
I like it
I am just satisfied when it goes to comparison and I will suggest it to others. Everything is in high quality and fair price.
30 July 2024
Unprompted review
Reply from OiSTER
Dear Arash,
Thank you for your positive feedback.
We're delighted to hear that you're satisfied with our services and find our quality and pricing fair. Your recommendation means a lot to us.
Thank you for choosing Oister.
Best regards,
Simone
I have Internet connection that is…
I have Internet connection that is deadly slow and streaming on laptop becomes difficult and time taking. Staff appointed should know reasons or atleast they should be technical enough to understand and figure out, rather than , ' sorry , we have no idea'
2 July 2024
Unprompted review
Reply from OiSTER
Dear Assad
Thank you for your review.
I'm very sorry to hear that you're experiencing poor internet connection - it's obviously not optimal!
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.
You are welcome to send an email to trustpilot@oister.dk if you want us to take a closer look at it.
Best regards
Emilie
Bad Service
I was patiently waiting for a week to get my new simcard, but there was no respond. I already paid for the simcard fee.
Calling to customer service without success, because they just cut off the line. Then when I could stand in unidentify queue, I was waiting for 35 minutes with no replying.
I decided to change to another telephone company, where they could solve the problem very quick.
And I got email from Oister that my number will stay with them until the end of the month. Thats not professional way to solve issue for customer. I cannot use my number. How can I stay to use the service that you offer.
I wont give any star for this service, and definitely not suggest it to anyone.
8 July 2024
Unprompted review
Reply from OiSTER
Dear
Thank you for your review.
We sincerely apologize for the inconvenience you’ve faced with receiving your new SIM card and the difficulties in reaching our customer service.
We understand how frustrating it is to wait for a week without any update, and we're sorry for the lack of response when you tried to contact us. This is not the level of service we aim to provide, and we regret that it led you to switch to another provider.
Regarding your number staying with us until the end of the month, we apologize for the confusion and inconvenience this has caused. We understand that being unable to use your number is highly inconvenient. We are committed to resolving such issues promptly and professionally.
If you want to contact us regarding the issue, feel free to contact us at trustpilot@oister.dk.
Best regards
Emilie
For me it’s a little bit expensive.
19 June 2024
Unprompted review
Reply from OiSTER
Dear customer,
Thank you for your review.
I'm sorry to hear that you think your subscription is a bit expensive.
I would really like to take a look at your actual consumption, and then we can see if we can find another subscription that suit you better and is cheaper.
You are therefore very welcome to write to us at trustpilot@oister.dk
We look forward to hearing from you.
Best greetings,
Simone
They are nice
They are nice. I would only like to see their website in English. It is a bit painful to navigate in Danish.
3 June 2024
Unprompted review
Reply from OiSTER
Dear Shiny,
We are pleased that you have taken the time to review us and then with a full 5 stars!
We are also very pleased to hear that you find our service satisfactory.
We understand that navigating our website in Danish can be challenging if you are more comfortable with English. We appreciate your suggestion to have an English version of our website and will certainly consider this for future improvements.
I wish you a great day.
Best regards,
Lærke
Charged a lot for roaming
I went to Turkey, i kept the line online less than a minute. I got charged a lot. I asked for a refund or bonus credits. They refused me.
28 February 2024
Unprompted review
Reply from OiSTER
Dear Yasin,
We are sorry to hear that you had a negative experience with our service during your trip to Turkey.
We understand your frustration regarding the charges for the short call, but the foreign prices a just super expensive.
I would like to investigate the matter further to see if there is anything we can do to improve your experience. Please contact me on the email trustpilot@oister.dk directly so we can gather all the necessary information and find a solution.
Best regards,
Lærke
OISTER IS A SCAM! Overcharging for nothing! Never using Oister again, wouldn’t recommend
I travelled to Turkey and as soon as i landed I got a message saying I’m using data outside of EU (even though I wasn’t using my phone but thought okay maybe something in background) and then turned it off. Then I get another email for 175kr, and another email for 375kr?! Saying I used data at 05:00 in the morning?! How can I use my data if it’s off like come on, and how you charge me and automatically take the money out. Completely ruined my vacation and my budget. You just lost a long time customer
10 May 2024
Unprompted review
Reply from OiSTER
Dear Noah
I'm sorry to hear about the frustrating experience you had while traveling to Turkey. It's certainly not the experience we aim to provide our customers with, and we apologize for any inconvenience caused.
It's important to be aware of the prices for mobile usage outside of the EU, as the rates for this are extremely high. To avoid unintended costs, we always recommend deactivating data roaming before departure. We apologize for any delays in registering data usage, as this can lead to misunderstandings about the timing of usage. It's important to note that the mobile phone cannot use data if data roaming is deactivated.
To investigate the matter further and find a resolution, i have now contacted you on the given information.
Best regards
Lærke
Included mobile data can not be used in…
Included mobile data can not be used in Switzerland. Most of the companies include Norway and Switzerland
1 May 2024
Unprompted review
Reply from OiSTER
Dear Raluca,
Thank you for your review.
At OiSTER, we cover all the countries included in the EU's roaming agreement. These countries are the EU countries, the EEA countries and the UK.
I have sent you an in-depth explanation regarding this, based on the information provided by you previously.
Best regards,
Julie
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