United KingdomO2 UK top-up
Recharge a prepaid O2 UK number in United Kingdom. Select a product below and check out securely.
- Airtime
- Data bundles
About the operator
Why top up O2 UK online
Prepaid recharge for United Kingdom
Telefonica UK Limited, trading as O2 UK (stylised as O2), is a British telecommunications services provider. It is the second largest mobile network in the United Kingdom behind VodafoneThree, with approximately 22.4 million subscribers as of December 2025. The name derives from the oxygen molecule.
Source: Wikipedia — O2 (UK)
How it works
Recharge O2 UK in three steps
- 1
Confirm network and country
Make sure the recipient uses this operator in this destination.
- 2
Enter the number
Type the prepaid number carefully. The form validates it for this country.
- 3
Select and pay
Choose airtime or a data bundle from the catalog, then pay in cart.
Delivery and failures
After checkout, ChatRefill submits the top-up through the existing fulfillment flow. Status shows on confirmation. See our terms of use for policy details.
Frequently asked questions
Use the form on this page to enter a United Kingdom number on the O2 UK network, select a product, and complete checkout.
Check the order confirmation status first. If fulfillment fails, follow support using your transaction reference and the terms of use.
Yes. Open the United Kingdom country page to see other supported networks.
Secure payments
Checkout is powered by Stripe. Pay with major credit or debit cards, or USDC and USDT. Card details are never stored on our servers.
Apple Pay and Google Pay where available. USDC and USDT at checkout.