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Your guide to joining giffgaff

1. It starts with a free SIM

Joining giffgaff is a piece of cake. Get started by ordering a free SIM. Already have a giffgaff SIM? Click below to activate it now.

Order a free SIM

Activate your SIM

If ordered before 5pm (Mon-Fri), most SIMs arrive the next day. Over 93% of them, in fact.

2. And an unlocked phone

You'll need an unlocked phone to use with your giffgaff SIM. If you're looking for a shiny new phone, you're in the right place.

See our phones

Need to unlock your phone? Find out how using our Unlockapedia.

Handy tip: If your phone is locked to O2, it'll work on our network. Hurrah.

3. Then buy a plan or some credit

We call our plans ‘goodybags’. And we’re pretty sure you'll love them, because they're:

  • Packed with data, minutes and texts
  • Flexible, so you can change each month
  • 4G as standard

See our plans

Or choose credit and benefit from our great PAYG rates.

Scroll down for more info on ways to buy.

Handy tip: If your local store doesn't have any giffgaff vouchers, an O2 top-up voucher will also work.

Some other handy info

Keep your old number

Bringing your old number to giffgaff is really easy. You just need to:

  1. Ask your previous network for your PAC code
  2. Pop over to
  3. Fill in the online form

And, hey presto, we'll bring your old number over to us on the date you choose.

Ways to buy

Your first purchase (whether it's a goodybag, credit or both) will happen when you activate your SIM. After that, you have some options.

Online with a card or PayPal
Use your credit/debit card or PayPal account to pay online at

Top-up vouchers
You can buy giffgaff top-up vouchers from most UK supermarkets or wherever you see the symbols shown below. Then redeem them online or by dialling 43430. Piece of cake.

Relax with a recurring plan
If you buy a goodybag when you activate your SIM, we'll set it to recur automatically each month to give you one less thing to worry about. You can cancel the recurring setting at any time via your giffgaff account.

Need help?

Ask our community
Our friendly community is at hand to answer your questions.
Ask away

Browse help
We’ve got loads of useful info in our help section.
Browse help now

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Check your giffgaff inbox to see if one of our agents has replied.
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