How do I join Giffgaff?

Giffgaff are one of the UK’s most popular mobile phone networks. They’re owned by O2 and were named UK’s Best Mobile Phone Network in 2016 and 2017. They are one of the big rivals of major networks like EE, ThreeVodafone and Virgin Mobile.

Joining Giffgaff couldn’t be easier. We’ve put together a guide showing you how you can join one of the UK’s biggest and most popular mobile phone networks.

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Joining Giffgaff

To join Giffgaff, you need to follow three simple stages, they are as follows:

1 – Pick up your free sim

You can apply for a free sim card through the Giffgaff website. Most sims will arrive the next day so you can get started and activate it straight away.

2 – Buy a mobile phone or unlock your current phone

If you have a phone that you like already then you simply need to get it unlocked so any sim card can be used. You can also buy a phone through the Giffgaff site. This can be bought outright or on a pay monthly plan. Monthly plans are spread over 24 months.

Tip: If your phone is on O2, it will work with a Giffgaff sim card and won’t need to be unlocked.

3 – Buy or plan some credit

They have a number of different plans that you can choose from. These are called Goodybags and you get to select the amount of data you need alongside minutes and texts. Depending on the amount of data you need, is how much you’ll pay a month. The more data the more you pay.

If you want to change your plan, you can do so on a monthly basis. So, if you want to reduce the amount your paying or increase it, then this can be done monthly.

Are you looking to cancel your Giffgaff contract? Then read our latest blog which shows you how.

Tip: if you’re looking to cancel your contract but have a phone deal, then you will either need to pay it off in full or continue making monthly payments until the end of your contract.

Frequently Asked Questions

Can I keep my old phone number?

The simple answer is yes. You will need to apply for a PAC code from your old mobile network provider. Once you have this number you simply call the Giffgaff contact number and speak to one of their team. This will then get transferred over to your new phone and your friends and family can contact you on the same number.

What network do Giffgaff use?

They use O2’s phone network which is unsurprising seen as they’re owned by O2. This provides users with both 3G and 4G coverage which covers most of the UK.

If you have any friends that are on the same network, then you can call them for free. 4G data is also provided as standard at no extra cost.

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How do I activate my new sim?

It’s a simple process to activate your sim card. All you need to do is the following:

  1. Go to and tap in your unique sim code
  2. You’ll then need select a ‘Goodybag’ or add some credit to your sim card. You can pay for this either with a debit/credit card or a Giffgaff gift card
  3. Put your sim card into any unlocked phone and away you go!

Sim cards are typically activated within a few seconds. It can sometimes take up to 24 hours so you may need a little bit of patience waiting for it to kick in.

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How do I contact Giffgaff?

Contacting them is easy, all you need to do is call the Giffgaff customer services number. Here you can speak to one of their team and they will happily answer any of your questions regarding their contracts, mobile phone deals and other enquiries.

Keep an eye on the Giffgaff community section of their website if you want to be kept up to date on any of the latest news. Here you can find forums and blog posts which may answer some of your questions.  If you need to pay your bill or look at your payment history, this can be accessed through your account. Simply log in and you’ll find all the details you need.