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 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
This company invites their customers to review, whether positive or negative
At Trustpilot, it's all about human content. This business can also access our AI-assisted response tool which helps them draft replies.
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See how their reviews and ratings are sourced, scored, and moderated.
Its a good one.
Its a very good company.
I have it sinve several years and I am very happy with it.
30 June 2023
Unprompted review
Reply from OiSTER
Dear Maria,
Thanks for your review.
It's great to hear that everything is going well for you - that's exactly how it should be!
We are excited about many more wonderful years with you.
Wishing you an amazing summer.
Best regards,
Sofie
Best customer service and the best…
Best customer service and the best offers highly recommended.⭐️⭐️⭐️⭐️⭐️
28 June 2023
Unprompted review
Reply from OiSTER
Dear Nada,
Thank you for your review and for recommending OiSTER! :-)
We're thrilled to hear that you've had a great experience with our customer service and find our offers to be the best. We appreciate your support and the 5-star rating!
Best regards,
Anne
Nobody can TRUST in Trustpilot
Nobody can TRUST in Trustpilot, too many think pe face.
23 June 2023
Unprompted review
Reply from OiSTER
Dear Hasan,
Thanks for your review.
Trustpilot is widely recognized as a reputable consumer review platform. It holds a prominent position as one of the largest and most renowned platforms for consumer reviews worldwide.
If you experience any challenges, I would recommend that you contact our customer service on 70 31 30 70.
Best regards,
Sofie
Good service
good service. the signal could be better, very good price. You could say that they deserve 5 stars
20 June 2023
Unprompted review
Reply from OiSTER
Dear Yudis
Thank you very much, for a super good review here on Trustpilot and with a full 5 stars, we are really happy about it!
We are so happy to hear that you are happy with our service and our competitive prices.
When it comes to coverage, there will unfortunately be areas where we do not cover quite as widely. There can be various factors that play into this, such as terrain, a lower number of masts or the distance to the mast.
If you want to, we would be happy to take a look at your signal challenges if you simply contact us on: 70 31 30 70
I wish you a lovely day.
Best regards
Lærke
It's okay
It's okay . it doesn't cover non EU countries like Switzerland Monaco etc. Which is not nice. My friend had another sim which was covering them all and we had to use his Internet when travelling . even calls in eu makes the balance go 0 in two minutes. I am thinking to switching to a sim with most countries coverage for cheap Internet in non eu
22 June 2022
Unprompted review
Reply from OiSTER
Dear Sara,
Thanks for your review.
It is correct that OiSTER does not offer international telephony in countries such as Switzerland, Monaco, etc.
You are also right that it costs money to make calls abroad from Denmark. If you are staying in a country with which we have an agreement, it will be possible to call other EU countries without being charged extra for the call. Therefore, you would be able to stay in Germany and make a call to a Spanish phone number for free.
If you are in doubt about what is included in your subscription, please do not hesitate to contact us on 70 31 30 70.
Best regards,
Sofie
I have been a loyal customer for over a decade, now it’s time to say bye.
After being a loyal customer for over a decade I have had it!
I was traveling to Türkiye and within 40sec from arriving I had used for 1000 DKK data (my boyfriend and I literally just opened our phones!!).
When I go to my subscription page it says that “Udenlandstelefoni med data” is included, but apparently it only means that your phone can work all over the world, nothing more than that. But I was not even able to send a text when I arrived, but you made sure to charge me for those two unsuccessful send texts (thank you!)
They only provide services when you are within EU.
This story I s even more ridiculous, because I was in Israel back in 2019, with no issues at all (and no, customer support person, I was not on Wi-Fi the whole time). As I did in Türkiye, open my phone at arrival and the whole week my phone was working and there was no extra charge when I got home.
So I was surprised and baffled that because I travelled to Türkiye I’m being charged an extra 1000 DKK within the first 40sec after opening my phone upon arrival.
Why is there such a huge difference between Türkiye and Israel - they are both out side of EU.
Please make it super clear for your customers that they can only use data within EU, and good luck trying to travel outside of EU and using your phone.
You have lost 4 loyal customers, who never experience any issues, but this is just too ridiculous and no help from your customers support. I have had it.
12 June 2023
Unprompted review
Reply from OiSTER
Dear Xenia,
Thank you for taking the time to share your feedback with us.
We apologize for any inconvenience or confusion you experienced regarding the charges during your recent trip to Türkiye.
We understand that it can be frustrating to encounter unexpected charges while using your phone abroad. We would like to clarify that our "Udenlandstelefoni med data" service covers usage within the European Union. For destinations outside the EU, such as Türkiye, different rates and conditions may apply.
At this link, you can see our prices abroad: https://www.oister.dk/globalassets/filer/oister-priser-i-udlandet-21-12-2022.pdf
We strive to provide clear and transparent information to our customers, and we always advertise that there is a certain amount of GB data on the subscriptions that can be used within the European Union. Furthermore we always recommend that you check up on this before you travel from Denmark.
If you have any questions regarding this, or have more details in this case, please contact us at: Trustpilot@oister.dk, and I will be happy to help you.
Best regards,
Anne
Correct and helpful
8 June 2023
Unprompted review
Reply from OiSTER
Dear Silviya,
Thank you for your review of OiSTER on Trustpilot.
We appreciate your feedback and are glad to hear that you found our service to be correct and helpful.
Wish you a great weekend :-)
Best regards,
Anne
The internet is slow
The internet is slow, and disconnects very often. I could not recommend.
29 May 2023
Unprompted review
Reply from OiSTER
Dear Monika,
Thank you for your review.
Although we strive to provide good coverage in our network, it is unfortunately not always possible to achieve broad coverage in all areas. There can be several factors that affect the quality of coverage, such as terrain, the number of transmission towers, or the distance to the nearest tower.
In your case, it may indicate that the tower is overloaded during evening hours due to high activity. There are some settings you can adjust on your router that we could try.
I would really like to take a look on your case. Therefore, I hope you will email me at trustpilot@oister.dk with your inquiry. Once I receive your email, I would be happy to look into your challenge further.
I look forward to hearing from you.
Best regards,
Sofie
Have very bad experiBad experience with OISTER.dkence with OISTER.dk
Have very bad experience with OISTER.dk
Their payment system is completely messed up and you can't get either a registration or account number for their van, so you can transfer money manually if you don't have the option to pay via MobilePay.
However, they also allow you to close your subscription and when you need to call e.g. the municipality or another public body, it will be called up by their customer service. And you close your subscription without giving notice. It is very cross-border.
For me, it has had economic consequences, as I had a telephone meeting with the municipality, which I could not hold because of this..
Cannot recommend OISTER.dk to others..
11 May 2023
Unprompted review
Reply from OiSTER
Dear Karl,
We appreciate your feedback regarding your experience with OiSTER.dk. We understand the frustrations and inconveniences caused by the issues you encountered with our payment system, and we apologize for any difficulties you faced in obtaining registration or account numbers for manual money transfers. Our aim is to provide a seamless and user-friendly payment process, and we apologize for falling short of your expectations in this regard.
If your OiSTER account goes into a negative balance exceeding -200 kroner or if you have an outstanding amount for more than 7 days, your subscriptions will be closed without prior notice.
If an OiSTER account has a negative balance, we always send an email and SMS regarding the outstanding amount. Additionally, we provide a link to log in to Mit OiSTER, where you can conveniently make the payment for the outstanding balance.
Regarding the payment system, we apologize if you experienced difficulties in obtaining registration or account numbers for manual money transfers. We strive to provide a seamless and user-friendly payment process, and we apologize if we fell short of meeting your expectations in this regard.
We appreciate your feedback and take it seriously as we continuously strive to improve our services.
Best regards,
Sofie
Kind and professional customer service
28 April 2023
Unprompted review
Reply from OiSTER
Hi Andras,
Thank you for sharing your positive feedback about the kind and professional customer service you have experienced. We appreciate hearing about your satisfaction with OiSTER's customer support.
We hope you continue to have a great experience with OiSTER! :-)
Wish you a great day.
Best regards
Anne
the signal is very bad and it bothers…
the signal is very bad and it bothers me that you drastically reduce the internet speed in the evening hours, so I'm thinking about switching to another operator
30 March 2023
Unprompted review
Reply from OiSTER
Dear Robert,
Thanks for your review.
Although we do our best to provide good coverage on our network, it is unfortunately not always possible to achieve broad coverage in all areas. There can be several factors that affect the quality of coverage, such as terrain, the number of transmission masts or the distance to the nearest mast.
In your case, it could indicate that the mast is overloaded in the evening hours due to high activity. There are some settings you can make on the router, which we could try out.
I would really like to get an overview of your case. Therefore, I hope you will write to me at trustpilot@oister.dk with your inquiry. As soon as I receive your email, I would like to take a closer look at your challenge.
I look forward to hear from you.
The best greetings,
Sofie
Great customer service!
13 March 2023
Unprompted review
Reply from OiSTER
Dear Virág,
Thanks for your review.
We always do our very best to offer our customers the best in quality and service. It's great that you give your opinion.
We wish you a nice day.
Best regards,
Sofie
Great service, setup with eSIM and pricing
Great service and super easy setup with the free eSim. Perfect solution for me and great that I easily can manage everything online. Customer support gave great help as well when I needed it.
Good prices too! :)
22 January 2023
Unprompted review
Reply from OiSTER
Dear Anne Sofie,
We are very happy about your review here on Trustpilot and then with a full 5 stars, thank you very much!
We always do our very best to offer our customers the best in quality and service. It's great that you give your opinion.
It is incredibly important to us that we always give our customers competent help and advice every time we are in contact. We are therefore pleased that this is also the experience you have had.
We wish you a nice day!
Best regards,
Sofie
ALWAYS DOUBLE CHECK YOUR DATA ROAMING WHEN OUTSIDE EU
After a questionable charge of 531.2DKK for having my data roaming on by default on a new phone while landing in Switzerland and India, a first fail with the website's customer service, and writing a bad review here, I was then contacted by Sofie from Oister's trustpilot customer service, which has been the most professional and understanding assistant. She helped me with my case and managed to restore my trust on the Company.
I also learned important lessons: never lose your hope and always double check data roaming when Outside EU!
2 February 2023
Unprompted review
Reply from OiSTER
Hi Andrea,
Thanks for your review.
Like the airlines, we always recommend that you put your phone on airplane mode or turn off your phone completely, so that you don't get an unpleasant surprise with incorrect charges. But of course we also know that this sort of thing can easily slip away or there may be a situation where you have to use your phone.
Something that pulls data could be, for example, notifications from Facebook, Instagram, Snapchat, WhatsApp, etc. If you therefore have data roaming activated on your phone while you are outside the EU, you will automatically be connected to a foreign cell tower, and will be charged for any usage.
SMS and calls do not use data in the same way as if you surf the internet.
We offer free telephony in the EU, and since Switzerland is not part of the EU/EEA, we do not offer free telephony in this particular country.
It is possible to read more about our telephony outside Denmark in the link below. Below you can also find the countries we offer the places you're able to use your phone:
https://www.oister.dk/tips-og-tricks/eu-roaming/
I'm sorry to read if you feel like we gave you a terrible experience. Of course, it is not our intention or desire that you should sit with that feeling. However, I would like to help you take a look at your case. You are welcome to contact us on 70 31 30 70 or trustpilot@oister.dk, and we can look into it!
I look forward to hear from you.
Best regards,
Sofie
I have just moved all the family over…
I have just moved all the family over to Oister and my sons mobile has had no connections for days. I have tried to ring oister to sort it out, only to sit in a phone queue for hours..... this is not very good :(
5 February 2023
Unprompted review
Reply from OiSTER
Dear Mark,
Thanks for your review.
Like many other companies, we are often very busy at the beginning of the month, which results in longer response times to e-mail and over the phone. However, we do our best to get through to everyone as quickly as circumstances allow.
I'm sorry to hear you've experienced problems using your son's phone. We must of course take a closer look at this, so that we can ensure that a similar scenario does not occur again - as it is in no way an appropriate experience.
I can't immediately see that you have been in contact with us at all.
I have just taken a look at your OiSTER Account and can see that there has been consumption on the subscription a few days after the number moved to OiSTER. Therefore, it appears that the subscription is currently working.
If you still experience problems using the phone, you are very welcome to write to me at Trustpilot@Oister.dk, so I can take a look at it!
I am looking forward to hear from you.
Best regards,
Sofie
God service!
31 January 2023
Unprompted review
Reply from OiSTER
Hej Finn,
Tak for en flot anmeldelse med hele 5 stjerner!
Vi gør altid vores allerbedste for at tilbyde vores kunder det bedste indenfor kvalitet og service. Hvor er det bare dejligt du giver din mening til kende.
Hvis du får brug for hjælp, skal du være mere end velkommen til at kontakte os på 70 31 30 70 eller kundeservice@oister.dk, der står mine søde kollegaer klar til at hjælpe!
De bedste hilsner,
Sofie
Reply from OiSTER
Dear Valentina,
Thanks for your review.
I am very sorry to hear that you are experiencing a poor internet connection - It is not optimal!
When it comes to coverage, there will unfortunately be areas where we do not cover quite as widely. There can be various factors that play into this, such as terrain, a lower number of masts or the distance to the mast.
However, you can try to switch on data roaming on your mobile if you have not already done so, which gives you access to use 3's roaming partner, and will possibly catch a better signal.
I think we must take a look into this more closely, so that we can ensure that a similar scenario does not occur again - as it is in no way an appropriate experience.
Please contact us at 70 31 30 70 or send an email to 2ndline-tech@oister.dk with ATT: Sofie in the header, then I would very much like to help you from here.
I am looking forward to hear from you.
Best regards,
Sofie
I'm kindda of new customer (only a few…
I'm kindda of new customer (only a few months), but I can say that the internet is the best!. I life in the countryside and was paying an expensive fiber net that was problematic, disconnecting all the time. I changed to OiSTER cuz I though: if it is as bad as fiber net at least I am paying half. But it is strong, fantastic and we only bought 1 router. I recommend it 100 %
7 December 2022
Unprompted review
Reply from OiSTER
Hi Emily,
Thank you very much for the nice review. - We greatly appreciate that.
We are really pleased that you are experiencing good coverage at your address, and that you are satisfied with our prices.
We are also super glad, that you want to recommend us :)
We hope for many good years with you as a customer
We wish you a wonderful day!
The best greetings
Lærke
Reply from OiSTER
Hi George,
Thank you very much for a good review.
I am glad that you had a good experience with our customer service. It's great that you give your opinion.
We strive to provide a really good service to our lovely customers!
I want to wish you a super nice day.
The best greetings,
Victoria
I have been a customer for 7 years
I have been a customer for more than 7 years now, I have Oister numbers for me and my entire family, and I recommended Oister to all my friends. Could not be more happy with the service, thank you!
23 November 2022
Unprompted review
Reply from OiSTER
Hi Daniel,
Thank you very much for a great review :-)
We are happy to hear that you are a satisfied OiSTER customer.
We always want to give our customers the best service, so we really appreciate you noticing our work!
We also really appreciate you recommending us to family and friends.
We look forward to many good years with you.
The best greetings,
Simone
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