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Giffgaff SIM Only Deals

  • Get up to unlimited data with Giffgaff SIM Only
  • Choice of great value plans
  • No contract so leave whenever you like
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Triple SIM (Standard, Micro and Nano)

Micro SIM card
9GB Data
Unlimited Mins
Unlimited Texts
1 month contract
£10.00 a month
1 month contract
£10.00 a month

Triple SIM (Standard, Micro and Nano)

Micro SIM card
Unlimited Data
Unlimited Mins
Unlimited Texts
1 month contract
£35.00 a month
1 month contract
£35.00 a month
  • Overview


Why choose Giffgaff SIM-only?

Giffgaff offers 5G with unlimited data, so you can make the most of 5G’s high speeds, or if you aren’t a heavy data user then you can also get a cheap plan, making it one of the more affordable networks to get 5G on.

Plus, Giffgaff’s SIM-only plans only last a month, so you’re not tied into a contract.

Giffgaff also uses O2’s infrastructure, which means it has 5G in all the same places – O2 is expanding its 5G coverage rapidly, so Giffgaff will benefit, as well as sharing O2’s extensive 4G, 3G and 2G coverage.

Giffgaff 5G coverage

Giffgaff 5G is available in a large and ever growing number of cities and towns across the UK. Its coverage is exactly the same as O2’s in fact. For full details of what places have Giffgaff 5G now and which are likely to get it soon, head to our Giffgaff 5G coverage page.

Giffgaff 5G speeds

Giffgaff has said that you can expect to be able to download an hour-long TV episode in as little as 17 seconds on 5G – or potentially in as little as 3 seconds if you’re right by a mast.

It hasn’t said what its exact 5G speeds are at the time of writing, but typically you can expect average download speeds of around 150-250Mbps on the UK’s 5G networks, with top speeds potentially reaching or exceeding 1Gbps. 4G is a lot slower, at an average of around 20-30Mbps, so 5G makes a big difference.

Added extras

Giffgaff is a great value mobile network, and it’s also focused on flexibility, as you’re not tied into a contract on SIM-only. These features take the place of any real extras, but you can roam and tether at no extra cost, and there are plans with unlimited data.

Data roaming

Giffgaff lets you use your allowances of minutes, texts, and data at no extra cost in dozens of countries across Europe.


Giffgaff lets you use as much of your data allowance as you want for tethering, so you can get tablets, laptops, consoles, and other gadgets online even when there’s no Wi-Fi.

How can I keep my number when switching?

To keep your number simply get your PAC code by texting ‘PAC’ to 65075 from your current mobile phone, then activate your new Giffgaff SIM card and enter your PAC code on Giffgaff’s number transfer page.

From there you’ll be able to pick what day you want your old number to be transferred on, and then you just wait.

Which size SIM will I get?

Giffgaff will send you a triple SIM, which contains all three possible sizes – standard, micro and nano, so if you don’t know which you need, just compare the sizes to the slot in your phone and pop out the right one.

What happens if I’m not in a 5G coverage area?

If you’re not in a 5G coverage area then your phone will use the best signal it can get – be that 4G, 3G or 2G. So the experience will be much like it was before 5G launched.

Will a 5G SIM card work in a 4G phone?

Yes, but it will only provide 4G speeds. For 5G speeds you’ll need a 5G phone.

Can I get a SIM card for my tablet or mobile broadband dongle?

Giffgaff doesn’t offer data-only SIM cards, but you can use its standard ones in data-only devices such as tablets and mobile broadband devices.

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