Pay As You Go Add-ons

Add-ons are a great way to get more for your money. Convert your credit into an Add-on to get data, calls or texts at the best value. Converting your credit into an Add-on is quick and easy. You can do it when you top-up or at any other time, as long as you have enough credit.

What's the difference between a top-up and an Add-on?


When your credit runs low, top-up to get more.

When you top-up, you get our standard rates, and your credit lasts until you use it up.


You can buy an Add-on at any time – you don’t need to top-up first. If you’ve already topped up and have credit, you can convert it into an Add-on.

Add-ons give you more for your money than our standard rates, and they last for 30 or 90 days.

Buying an Add-on

Get an Add-on while topping up

You can top-up using the Three app with a card or voucher, or on our website, then convert to an Add-on. Or, skip the top-up step and just buy an Add-on.

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Already topped up?

No worries – use the Three app to grab a great value Add-on. You can also login to your My3 account to buy an Add-on.