o2 Deutschland Reviews 

AVOID them at all costs

They cut my phone off even though I had paid the bill for for months and with no warning.

After I filled out the form out twice to show proof of payments. Still no response and my phone stays cut off and disconnected. I was abroad so I had no way of going into a shop or contacting them since they do not return your complaints, emails or have any way to contact them.
Total disgrace of a company

O2 is such a disappointing phone plan company. They have pressured me into having 3 different phone numbers despite pushing via phone SEVERAL times that I only need 1. I was just scammed into getting a "cheaper phone line" when actually it just doubled my bill.
The amount of work we have to do just to make sure we're not taken advantage of by O2 is insane and not worth it. Do not get a phone line with this company.

I called the O2 support telephone number to get an explanation for why I was being charged 60.99 € for the XL O2 plan instead of 24.99 € during the last three months.
The agent, Omar from Albania, spoke with his supervisor and then told me that there was a mistake in O2’s billing system for my account. He said he had corrected this mistake, that I would receive a refund for the last three months, and that O2 would send me a confirmation email within 10 minutes.

All of this turned out to be lies just to get me off the phone. I swear this is exactly what happened. They took my money, especially now that my contract is ending soon.
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Ich habe die O2‑Support‑Hotline angerufen, um eine Erklärung dafür zu bekommen, warum mir in den letzten drei Monaten 60,99 € für den O2 XL‑Tarif berechnet wurden, obwohl mein Vertrag eigentlich 24,99 € kostet.
Der Mitarbeiter, Omar aus Albanien, sprach nach eigener Aussage mit seinem Vorgesetzten und teilte mir anschließend mit, dass es einen Fehler in der O2‑Abrechnung für meinen Vertrag gegeben habe. Er sagte, er habe diesen Fehler gelöscht, ich würde die Kosten der letzten drei Monate zurückerstattet bekommen und O2 würde mir innerhalb von 10 Minuten eine Bestätigungs‑E‑Mail schicken.

Alles stellte sich als Lügen heraus, nur um mich aus dem Telefonat zu drängen. Ich schwöre, dass es genau so passiert ist. Sie haben mein Geld genommen, besonders jetzt, wo mein Vertrag bald endet.
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تصلتُ بخدمة دعم O2 عبر الهاتف للحصول على توضيح حول سبب احتساب 60.99 يورو على باقة O2 XL خلال الأشهر الثلاثة الماضية، رغم أن قيمة العقد الأصلية هي 24.99 يورو فقط.
الموظف، عُمر من ألبانيا، قال بعد حديثه مع المشرف إنه كان هناك خطأ في نظام الفوترة الخاص بـ O2 بالنسبة لعقدي. وأخبرني أنه قام بحذف هذا الخطأ، وأنه سيتم إرجاع المبلغ لي عن الأشهر الثلاثة الماضية، وأنني سأستلم رسالة تأكيد عبر البريد الإلكتروني خلال 10 دقائق.

لكن تبيّن أن كل ذلك كان كذبًا فقط لإنهاء المكالمة وطردي من الخط. أقسم أن هذا ما حدث بالضبط. لقد أخذوا أموالي، خصوصًا أن عقدي سينتهي قريبًا.

i could not resolve my issue for no adequate reson via mail. So they asked to contact via chat bot.... or phone call.... chat bot needed credentials instead of just getting a client number and work with me. I did screenshots of awful service 30th august and still can't complain about it.... why not simply create a ticket system that user can complain with no overhead...

Very bad quality of service. I never recommend O2 Deutschland.

The internet has been cut for 4 days for the second time in the same month and before also. It is totally painful to spend days without internet where my freelance work depends on it

Piece of shit, this internet one of the worst things ever, lagging every day, bad speed, satan create this quality connection…..

Godawful company. Website is awful and never works (I haven't been able to log in to my account on the O2 website on my phone in 6 months, because every time I click the log in button, it brings me to a blank page that never loads; why is this not fixed?) They have stolen my money and screwed with my prepaid plans multiple times. They refunded my account and fixed the issue last time their system double charged me for 2 different plans, but for some reason, this time they "cant" refund me. This time, I had 9.28 euro on my O2 account. I had cancelled automatic top-ups twice and for some reason, the website never worked and didn't activate my cancellation either time. So they charged me 10 euro, which they took from my O2 account (no idea what they were taking that to pay for, as I had already paid for my prepaid plan and had 10 days left.)Then they charged me 4 more euro because I didn't have enough money on my account. Then they charged me another 10 euro the next day, and another 4. So my account went from 9.28 to -18.72 because of their system. I want to know why you people are taking that money from my O2 account. What are you stealing it for???
They refuse to take any accountability, customer service is horrible and useless, and they never respond to anything. Don't bother submitting a complaint form or calling. You won't hear back. Never ever ever use them if you can avoid it. I wish I had never signed up for them and will tell everyone I know that they are the worst phone company I have ever used. I want my money back, and I was planning on using it towards the next month, but I wont get it because they refuse to answer anything. They are the worst people on the planet and I hope they go bankrupt.

Horrible horrible company. Website is awful and never works (I haven't been able to log in to my account on the internet on my phone in 6 months, because every time I click the log in button, it brings me to a blank page that never loads, why is this not fixed?) They have stolen my money and screwed with my prepaid plans multiple times. They refunded my account and fixed the issue last time, but for some reason, this time they "cant" refund me. This time, I had 9 euro on my O2 account. I had cancelled automatic top-ups twice and for some reason, the website never worked and didn't activate my cancellation either time. So they charged me 10 euro, which they took from my O2 account (no idea what they were taking that to pay for, as I had already paid for my prepaid plan and had 10 days left.)Then they charged me 4 more euro because I didnt have enough money on my account. Then they charged me another 10 euro the next day, and another 4. So my account went from 9.28 to -18.72 because of their system. They refuse to take any accountability, customer service is horrible and useless, and they never respond to anything. Never ever ever use them if you can avoid it. I wish I had never signed up for them and will tell everyone I know that they are the worst phone company I have ever used. I want my money back, but I wont get it because they refuse to answer anything.

Horrible. I signed up and am trying to complete the verification to activate my plan, but the system is completely archaic and lacks any proper management. You have to join a video call with the support agents, and they simply skip over you. "Horrible" is an understatement—seriously.

Finger weg von o2

If I could rate the service, I would give it a very low(-0) score.

The internet connection and customer service have not met my expectations. Based on my experience, I would not recommend o2 for a reliable internet service.

I signed a contract at the o2 shop in Paderborn on 04.07.2026. The first technician appointment was scheduled for 27.07.2026. I took a day off work and stayed at home, but the technician did not arrive. Later, I was informed that a report had been made stating an issue with the doorbell, which was not accurate, as visitors were able to reach me that day without any problems.

Afterwards, a second appointment was arranged, but again no technician came. When I contacted customer service, I was told that only the appointment had been scheduled and no further action had been taken.

As a result, I have taken time off work twice and still do not have an active internet connection.

I previously used 1&1 and Telekom, and both services were acceptable. However, I was advised by my husband to switch this time, and I now realize that this was not a good decision for me. Finger weg

They have outages everywhere in Munich and even though you call them they dont do nothing about it!!!

I am a Loyal customer of O2 a decade. When I try to extend the contract they rejected it, I dont know why this company doesn't give a shit about their LOYAL customers. I am going to change it now

Scam and horrible company just stay away if you dont want any headache, look to the following without any information and without telling them a single word they they throw a new contract at me or added in my account and i really dont know if i will be able to get out of this trap and dont know where to complain. Neuer Vertrag
0, Mobile Unlimited M (2026), look at the this biggest scammers now i dont know to knock the door of court or what to do

I have ordered macbook pro in installments years ago from this scam company. But they never delivered the macbook neither sim card. As they can see it was never activated. Now guess what happened later. This scam company charges me now 100 euro for nothing. Still to this day I receive invoices. They even sent it to lawyers despite I have million times emailed them and even talked to customer service. Of course their customer service nearly doesn't exist. Worst company ever.

Very bad and terrible network. I have been using it since 2 years just because i am on contract for O2 homespot. I tried to cancel the contract but then i have to pay a one time amount to close the contract for the O2 router.

if there were 0 stars, that would be more suitable.. if you are looking for a home internal O2, it is not an option, it is the same as not having it!!! don't waste your time and money on this

I signed a contract for home internet on June 15.
The rep said my activation date was July 7 but that sometimes it happens sooner.

At no point on July 7 did the internet work, despite following all directions from the app to set everything up. I reset router many times and called help desk who said nothing could be done until 22:00, at which time of course the help desk is no longer open.

I called the next day again. No one could help that day they said: “call back tomorrow 9-17:00.”

I called back the next day. They can’t help either and give me a different number to call.

That number gave me a ticket number and said to wait for an email. I received no email, but one phone call which I missed due to being in a meeting. I called back. No help again.

I received a text saying Tritek was trying to reach me. I attempt to call the number listed, but it is unavailable. I email them. No answer. It’s now July 11 and I need the connection to work from home.

My phone contract is ending soon and o2 is asking if I want to re-sign my contract, but at this point I can’t imagine ever signing a contract with them again.

Do not trust anything O2 promises you over the phone. I cancelled my contract, and their retention team called me times in the last month, and during the last call, they were offering 15 GB for €8.49. I agreed. Instead, they activated only 5 GB in their system for that price.

Because the first invoice arrives a month later, you only spot the lie after their standard 14-day withdrawal window closes. Then, customer service hits you with a brick wall, claiming you are "too late" to cancel.

To top it off, I successfully ported my number away to another network. To keep charging me anyway, O2 generated a random substitute "ghost" number on my account and locked the contract until 2028.

They are completely ignoring my legal GDPR requests to produce the call recording. I've had to file a formal complaint with the Federal Network Agency (Bundesnetzagentur).

Avoid O2 Germany at all costs, I mean, look at their review score here in trustpilot...
I guess this is my fault, had I seen these reviews I would not have started anything in the first place with O2.

O2 can do, O2 cannot do when it comes with cancellations.

Agit and Filiz were brilliant at the O2 shop in Berlin Central Station. The only people that helped me when my bag had been left on the train and I had no battery. They gave me power, water and a cool supportive space to get myself sorted. Thank you!