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SIM & number

How to activate your SIM

Activating your new giffgaff SIM is easy, just follow these simple steps.

  1. Head to to activate your giffgaff SIM.
  2. To complete your SIM activation you'll need to top up for the first time with a minimum of £10 (either airtime credit or a goodybag). You can pay with your credit/debit card or a giffgaff top-up voucher.
  3. Pop your newly activated SIM into an unlocked phone and you're ready to go.

I have a SIM that came with my giffgaff phone
If you bought a phone from us and have the SIM that came with it, follow the process above. Just make sure you give us your giffgaff member name when asked, so we can activate the goodybag you've already selected. Find out more

Want to keep your old number? Find out more

Ensuring a smooth activation

Activating your SIM is easy. Though sometimes there may be a little hitch. If you find that your activation code is rejected, you may want to check variations, e.g. 0 (the number) and O (the letter). Activation and top-up failures may also be caused by your browser cache building up. Try clearing your cache, restarting your browser and re-trying the activation process.

Learn more about the activation code

Learn more about incomplete activation

Length of activation

Most SIMs are activated within a few seconds. On some occasions it can take up to 24 hours. If your activation is still not complete after 24 hours, contact one of our helpful agents.

Ask an agent about the activation of your SIM

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The Knowledge base

Find more FAQs in our Knowledge base