Buy O2 Top Up Voucher

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Conveniently top up o2 credit online

Topping up your o2 balance is easier than ever! Buy your O2 top up eVoucher directly online at Dundle (DE) and enjoy the straightforward ordering process. Receive your digital code instantly via email, now you’re ready to redeem your o2 Pay As You Go Top-Up. Have a preferred payment method such as PayPal? You will find it among our 72 secure payment methods! Top up wherever you are, Dundle is here to help around the clock. You will automatically earn Dundle Coins with your order as an added bonus. Use these coins and exchange them for discounts on future purchases. A couple of clicks is all it takes to be able to call your loved ones!

What are the benefits of an o2 Top-Up online?

With the mobile provider o2, control your costs and enjoy full flexibility with no-strings attached. Thanks to a wide range of prepaid rates, o2 caters for every individual need. Whether you opt for single billing or flat rates for calls and texts, o2 provides for you. It is no surprise that o2 has won so many awards for its quality service. You can easily top up any o2 phone online easily and worldwide, not just your own. Just key in the number of the mobile you want to add credit to when you ring the o2 top up number. Receive your code instantly via email and contact loved ones right away. Follow the redeem instructions attached in the email, and you’re ready to go!

o2 FAQs

German customers: For German Customers, your o2 credit does not expire once your o2 mobile phone number is valid. You can check the current validity period by dialing *102#. Make sure to top up once every 6 months so your number remains valid. Therefore, you can use up your credit within six months of topping up. With each new top-up, the validity of the entire credit is extended by another six months. If your phone number expires or you wish to deactivate it, you can easily withdraw your remaining credit. 

UK customers: Make sure to redeem your o2 Pay As You Go Top-Up within 12 months after your purchase. It will no longer be valid after 1 year. Additionally, once you have topped up your mobile device, you have 6 months to carry out a chargeable activity, or your mobile phone will be disconnected. After this time, you will lose any remaining balance on your account.

There are a number of ways you can top up your o2 mobile phone number. The option you choose should reflect the country your number is registered in. There are different options available for German and UK customers.

German customers:

  • To recharge, all you have to do is enter the key combination 103rechargecode# and press the call key or send followed by your digital code. 

  • Call the free o2 recharge number 5667 (within Germany) and follow the voice instructions.

UK customers: 

  • Dial 4444 free from your mobile (within the UK), enter the number on your receipt, and follow the instructions.

  • Dial 08456 062 277 from a landline, enter the number on your receipt, and follow the instructions.

There are several ways to check your o2 balance. Remember, there may be different methods available to you depending on the country your o2 mobile phone number is registered to.

German customers:

  • Enter the key combination *101# into your cell phone and press the call key or send - your current account balance will then be shown on the display in a few seconds.

  • Call the free service number 5667 and select option 2 for "Query current credit".

  • You can also find all top-ups and debits in your My o2 account (in German).

UK customers: 

  • Sign into your My o2 online or through the app.

  • Press Hotkey 2 on your mobile phone.

  • Key *#10# then press the call button.

  • Dial 4444 free from your mobile phone.

You can sign into your My o2 from any device to check your balance. If you don’t have an account, don’t worry! You can follow these simple steps:

  • Place your sim into another phone.

  • Turn wifi off so you’re connected to the o2 data network (you won't be charged for using data on the My o2 website).

  • Go to My o2, there you can check your balance without signing in.

For UK customers, there are three ways to check your o2 bundle.

  • Call 4444 free of charge, then choose option 2 and 2 again.

  • Text BALANCE free to 20202.

  • Visit My o2.

For more information on o2 Bundles, visit their website.

Yes, of course! Your o2 Mobile credit allows you to make calls, send SMS and use the Internet simultaneously. See the Classic Pay As You Go charges for the standard rates for UK customers. If you are a German customer, check out the prepaid rates information webpage (in German).

German customers: Yes, it is possible to call abroad with your o2 mobile credit. o2 provides a list of charges when abroad that will apply to you (in German).

UK customers: A comprehensive overview of the international charges that may apply when on your travels can be found on the o2 website.

If you are a German customer you cannot top up someone else’s. UK customers can easily top up any o2 phone online easily and worldwide, not just their own. Just key in the number of the mobile you want to add credit to when you ring the o2 top up number. Call 4444 free from your mobile, or 08456 062 277 from a landline, enter the number on your receipt and follow the instructions.

For any queries you may have concerning your o2 prepaid phone the o2 Customer Service will be happy to assist you. 

German customers:

  • Contact o2 Customer Service via their English-speaking prepaid hotline +49 (0) 89 66 66 30 08 1.

  • If you would rather contact customer service online you can do so via the o2 contact page (in German)

  • You can also contact them via the o2 live chat, which can also be found on the o2 contact page.

UK customers: There are a number of options available to you.

  • Dial 4445 free of charge from your o2 mobile phone.

  • Dial 0344 809022, from a landline, standard UK rate applies.

  • When abroad, dial +44 7860 980 202 (free of charge).

Dundle in Germany de

We sold our first digital gift card in Germany in 2014. Our vision is that buying prepaid cards online should be easy, fast and convenient. Whether it is payment cards, gaming credit or mobile phone credit - Dundle has got you covered! We tailor our range of products specifically to the German market, so check in with us regularly to see our quickly growing catalogue for Germany.

Instant delivery

You will receive the code directly by email, so that you can use the credit immediately.

Gift card design

Choose from more than 10 different templates.

Secure payment

Complete the checkout process safely and quickly with a choice of more than 70 payment methods.

PayPalKlarnaGiropayVISA / Mastercard / AMEXApple PayPhone Payment (Call)TrustlySkrill
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