Skip to content

Joining giffgaff: the step-by-step guide

1. Get a giffgaff SIM card

The only things you need to join giffgaff are an unlocked handset and a SIM card. You can order a Free SIM card online right now.

We now also send SIMs to fit both Micro SIM & standard SIM they usually take from 1 to 3 days to arrive from when you order them.

2. Unlock your phone

If when you put a giffgaff SIM card in your phone and get an error message and no coverage sign, it's likely that your phone is locked to your previous network.

There are many different ways to unlock your phone, go to giffgaff's Unlockapedia to find out which one works best for you.

Handy tip: If your handset is locked to O2 it will work fine with giffgaff.

3. Make your first top-up when you activate your SIM

Got your SIM card and an unlocked phone? Now you need to activate your SIM online. You'll be asked to insert the code that's printed on your SIM card, create a username and you'll have to make your first top-up or goodybag purchase (£10 minimum).

You can top-up using a credit /debit card online or use a top-up voucher online which can be purchased anywhere you see the logos below. More info on SIM activation.

Handy tip: Ask your local store for a giffgaff voucher. If they can't find it, an O2 top-up voucher will also work.


Making the most of giffgaff

Bring your existing phone number to giffgaff

Once you've activated your SIM, you can bring your existing phone number to giffgaff. It's a quick and simple transfer process. You first need to ask for a PAC code from the network you're leaving and then fill in our form to transfer your number.

More on transferring your number to giffgaff

Ways to top-up at giffgaff

Remember: Your first top-up needs to be online in SIM activation (step 3 above).

online credit /debit card top-up
You can use a credit /debit card to top-up online or buy a goodybag. The minimum top-up is £10 and the maximum £30


Top-up by voucher
You can top-up by a voucher and use it online or by dialing 43430. Note: only online voucher redemption is accepted on SIM activation (step 3).


Recurrence & Auto top-up
Set your goodybag to recur each month, so it automatically renews itself. The easiest way to top-up is to set-up auto top-up. You'll be able to configure the amount you want to top-up and maximum amount of top-ups per month.

Need help?

If we haven't solved your doubts on the process of joining giffgaff try asking the giffgaff community.

If you are having issues activating a SIM card, transferring your number or topping up, visit our support page to ask a giffgaff agent.

If you have already asked a question to an agent, check your inbox for their answers.