giffgaff is currently offering 40GB data for £10 for the first 6 months when you sign up to an 18-month contract.

In the UK, giffgaff has just launched a data boost offer on their £10 SIM-only contract. From now until the 31st October 2023, you can get a massive 40GB data for £10 for the first six months (increased from the normal 25GB per month). You’ll also get unlimited UK minutes and unlimited UK texts, with access to 4G & 5G coverage on the O2 network.

In this article, we’ll look at giffgaff’s £10 contract data boost offer, and how you can get 40GB data for 6 months when you sign up on a £10 good contract. We’ll also look at some of the features you’ll get included on the plan, and how you can keep your current phone number when you switch to giffgaff.

£10 Promo Terms: Offer ends 31/10/2023. Get extra data for a 6 month period after which data allowance returns to 25GB. Contract commitment is for 18 months. Valid payment method must be saved and set to auto-renew monthly. Terms apply. See

40GB Data for £10 on giffgaff

As a special offer that’s running until the 31st October 2023, giffgaff has boosted the amount of data that’s included on their £10 contract plan for the first six months of your contract.

With the offer, you’ll be able to get a whopping 40GB data per month for the first six months (increased from the normal amount of 25GB per month). You’ll also get unlimited UK minutes and unlimited UK texts included:

£10 SIM Only ContractUnlimitedUnlimited40GB
for 6 months
was 25GB
18 months

The plan comes with 4G and 5G coverage from O2, plus inclusive EU roaming (up to 5GB per month). You’ll need to sign up for an 18-month contract but you’ll retain the flexibility to change your plan over time.

giffgaff Features

Change Your Plan Anytime

Although you’re signing up for an 18-month contract, you’ll still have the flexibility to change your plan from month to month.

For instance, if things change and you want to spend less next month, you can swap to another plan within giffgaff’s 18-month range. This is possible without resetting the term of your commitment or incurring early termination fees.

Similarly, you can swap to another 18-month plan that gives you more data included. You can also refresh your next plan early, if you run out of data.

The following table shows the other plans available within giffgaff’s 18-month range:

£8 SIM Only ContractUnlimitedUnlimited6GB£8.00
£10 SIM Only ContractUnlimitedUnlimited40GB
for 6 months
was 25GB
£15 SIM Only ContractUnlimitedUnlimited40GB£15.00
£20 SIM Only ContractUnlimitedUnlimited120GB£20.00
£25 SIM Only ContractUnlimitedUnlimited120GB
+ Always On
£35 SIM Only ContractUnlimitedUnlimitedUnlimited£35.00

No Credit Check

Unlike on many other SIM-only contracts, there’s no need to undergo a credit check when you sign up to a contract from giffgaff. That means there’s a lot less hassle: there’s no need to provide lots of obscure information such as your address history and bank account details before you sign up. In addition, the plans are open to everyone, so there’s no need to have a lengthy UK credit history to sign up.

To get this deal, you can simply order your free SIM card online. When it arrives, you’ll be able to activate it and pay for your plan using a credit card or debit card.

4G & 5G Coverage From O2

giffgaff is powered by the O2 network – you’ll get both 4G coverage and 5G coverage included as standard.

Before you sign up as a new giffgaff member, it’s worth checking to make sure you can get coverage where you live. You can do this by entering your postcode on giffgaff’s online coverage map:

Check giffgaff coverage ( →

5G T&Cs: You need 5G coverage, a 5G device and SIM, and 5G switched on in your giffgaff account. Find out more about 5G coverage see Terms apply, see

Inclusive EU Roaming

You’ll be able to use your plan allowance at no extra cost (up to 5GB per month) when you travel in the EU and selected destinations. This includes popular tourist destinations such as Spain, Italy, France, Portugal and more.

The inclusive European roaming is limited to 5GB data per month. For most users, this should be more than enough. According to Ofcom, the average UK mobile user consumes about 8.1GB data per month. This is equivalent to about 1.9GB of data per week.

EU Roaming T&Cs: For all plans with over 5GB UK data, data roaming in EU and selected destinations is capped at 5GB. You’ll be charged 10p/MB once 5GB is used.

Fairer Exit Fees

You can change between giffgaff’s 18-month plans at any time, without resetting the term of your commitment or incurring early termination fees.

If you’re leaving giffgaff altogether, the early termination fee is just 50% of your current plan cost, multiplied by the number of months you have remaining on your contract.

Certified B Corp

giffgaff is a certified B Corp with a score of 85.8. This score is based on five main areas: how they treat their customers, colleagues, the community, the environment, and how they run their business.

According to giffgaff, they’ve generated more than £1m worth of charitable donations together with their members. In addition, all of their SIM cards are made from recycled plastic, with fully recyclable packaging. giffgaff also offers a choice of refurbished mobile phones, allowing members to save money and to be more sustainable.

Keeping Your Phone Number

It’s easy keeping your current phone number when you switch to giffgaff.

Start by ordering your new plan from the giffgaff website. Once you’ve done that, you can ask your current mobile network to give you a PAC Code. This is available through your mobile network’s website or app, or by texting PAC to 65075.

Your giffgaff SIM card will normally be delivered to you on the next working day after you place your order. Once you’ve activated it, you’ll be able to submit the PAC Code online through a form on giffgaff’s website. This will schedule the transfer of your phone number (normally for the next working day, as long you submit it before 3pm).

For a step-by-step guide on how to transfer your phone number to giffgaff, please select your current mobile network from the drop-down menu below:

PAC Code Finder: Transfer Your Phone Number to giffgaff

Select your current mobile network:

  More Options

More Information

For more information about the 40GB for £10 contract data boost, please see giffgaff’s official website. You can also read our in-depth guide to contracts on giffgaff.

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