Help and Support

Topping Up

Topping Up

1. Calling the O2 Top-Up line

If you're in a direct dial country, you can call the O2 Top-Up line for free by:

  • Calling 4444
  • Using Hotkey 3 on your Pay & Go mobile
  • Calling +441753 552 277 from any phone
  • Calling 03456 062 277 from any landline

If you're topping up from a country that doesn't allow direct dialling, enter *111*# then press the call button. Your mobile will go on standby for a few seconds before it rings.

Answer the call and follow the instructions to access the Top-Up line by dialling 4444#.

2. E-Top Up cards

If you have an E-Top Up card, simply:

  • Call 248 free from your mobile
  • Enter the 19-digit number on the back of the card
  • Enter the 5-digit PIN under the scratch panel on the back of the card

You'll then get a text confirming that the card has been registered successfully and the credit will be added to your account.

Once you've activated an E-Top Up card, you can use the card to top up your mobile anywhere you see the E-Top Up logo.

3. Auto Top-Up

To get started, sign in to your My O2 account and activate auto top-up.

You can then set a regular day or date to top up your mobile, with a specific amount of money. You can even set top-ups to activate when you're low on credit. We'll take care of the rest and you can cancel at any time.

Other ways to top up

  • Buy a voucher in any shop where you see the green top-up logo
  • Visit a cash machine with the green top-up logo

Topping up abroad

If you're off on holiday, it's a good idea to top up your mobile before you leave. But if you need to top up overseas, you can:

  • Take an O2 voucher with you
  • Call the O2 Top-Up line and use your credit/debit card
  • Top up online (we recommend using wifi to avoid data charges)

Top-up limits

  • The maximum amount you can top up your mobile with your credit/debit card is £100 every 30 days
  • There's also a £30 limit per 24 hours. If you've already topped up to this level with a credit/debit card, you'll need to use one of our other methods, like E-Top Up, cash machine or vouchers
  • If you add credit using vouchers, or in your local shop using E-Top Up, you can top up a maximum of £50 at once
  • You can add credit by voucher and E-Top Up as often as you like, and there's no limit to the amount you can top up in a given period of time


If you're having problems using our online top-up service, then try clearing your browser cache. On Internet Explorer, click Tools, then Internet Options and select Delete Files and/or Cookies.

If you have any other questions about topping up your Pay & Go account:

  • Contact us via Live Chat
  • Call 4444 free from your mobile
  • Call 0345 606 2277 from any other phone (standard rates apply)

If you're not sure about any techy terms, check out our jargon buster

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