Cookies on the SIM Sherpa website

We use cookies to track which pages on our website readers visit most. This helps us understand which topics people find interesting, to write more articles about them.

You can accept these tracking cookies or choose to block them. You can change these settings at any time.

X close

✖ Tracking cookies deleted and blocked

Ok, we will not track your page views as you move around any part of the SIM Sherpa website. But we will use that one cookie to remember you don't want to be tracked.

Click here to unblock tracking cookies

X close

✔ Cookies accepted

Thank you for accepting cookies for the SIM Sherpa website. This will help us constantly improve our content.

If you ever want to change your cookie settings for our website, go to our Cookies page here.

giffgaff vs Three: coverage, 4G speeds and benefits compared

Three vs giffgaff

The retailers featured on this page may compensate us when our readers follow links to their websites and make a purchase. More

We look at the differences between Three and giffgaff on pay monthly and pay as you go plans to help you decide which is best for you. SIM Sherpa is your trusty guide. Last updated: May 19th 2020.

Special offer notifications

giffgaff hidden £5 free credit offer

Latest giffgaff offer

Top up your new SIM with at least £10 or buy a goodybag of the same value and get £5 free credit: only when you order via our special invite page.

See how the offer works > opens in new tab

Three's hidden £18 unlimited SIM

Three's hidden unlimited data deal

Pay only £18 a month for unlimited everything with Three's hidden £18 a month unlimited data SIM only offer (12 month contract).

See all our hidden Three offers > (opens in new tab)

Comparing giffgaff and Three's mobile networks

Coverage compared on Three and giffgaff

Do giffgaff or Three have better signal around the country?

Mobile signal bars with giffgaff and Three logos

giffgaff better for calls, 4G data more even

About giffgaff's 4G

at giffgaff.com
(opens in new window)

While Three run their own network, giffgaff are owned by O2 and use theirs. giffgaff have more of the physical landmass of the UK covered for basic calls and texts than Three, where there are some rural blackspots still.

In towns and cities, this difference disappears. But we would also predict that indoor coverage for calls and texts will be generally better on giffgaff, because of the frequencies they use.

When it comes to 4G data, it's Three that have the minor advantage over giffgaff in terms of the amount of the whole geography of the country they've got covered. But again in towns and cities, they're basically even.

So the overall picture is mixed. Our tip is to work out where you'll most often use your phone (not just at home) and check your coverage on both using their maps below so you don't rule neither out unneccessarily.

Useful link: Latest Three network developments

Three's 5G is live while giffgaff don't have it

Three 5G locations map

See all locations

at Three.co.uk
(opens in new window)

The big difference between giffgaff and Three on coverage is the fact that Three already have their 5G network live, while giffgaff don't offer the technology at all, despite their hosts O2's 5G already being switched on.

The number of towns and cities with Three's 5G currently totals 68 (see the full list and planned future locations here). But it's worth noting that doesn't mean the entire place has it, just certain busy areas within them.

5G comes as standard on all Three's plans, including even pay as you go, as long as your phone actually supports the feature. Compare 5G-ready phone contracts here using our tool.

We don't expect giffgaff to offer 5G this year. They were late with 4G and they're run as a more low-frills provider. Their competitors on the O2 network Sky Mobile and Tesco Mobile do have it though.

Useful link: Latest news on Three's 5G rollout

Use their network maps

Avoid disappointment and make sure you're happy with either's reception near you

giffgaff signal map

giffgaff coverage checker

Check giffgaff signal

using their official map
(opens in new window)

Three's signal map

Three coverage map

Check Three signal

using their official map
(opens in new window)

Our verdict on coverage:

Win for giffgaff

"Using O2's network puts giffgaff at a slight advantage over Three when you look at how much of the entire country is covered - although people in urban areas will probably notice little difference between them."

Compare pricing and deals

4G data speeds: giffgaff and Three compared

Is 4G faster on Three or giffgaff?

Speedometer with Three and giffgaff logos

Expect faster 4G data on Three than giffgaff

Read why

at Three.co.uk
(opens in new window)

Concentrating on 4G data, independent network testers Opensignal and Speedtest by Ookla have clear results showing that typical download speeds are faster via Three's network than the O2 network that giffgaff use.

Based on millions of measurements taken on smartphones up and down the country, they say typical downloads on Three are 21.60 Mbps, while you could expect around 16.95 - 18.00 Mbps via O2's network.

Both networks in real life will go faster and slower than those results but Three's average is in the range where things like UHD will stream smoothly, where O2 could start to creak.

Both networks are more than adequate for basic usage like checking emails, browsing the internet, streaming music and using social media.

Useful link: What difference 5G will make

We think giffgaff may be slower than O2 directly

Screenshot of giffgaff speed complaints

The above speed predictions are based on being on O2 directly vs Three, rather than being on giffgaff themselves.

There does seem to be some customer dissatisfaction among people on giffgaff that their data service is slower than when they were on O2 directly (examples here, here and here).

The consensus among their customers seems to be that giffgaff have a lower bandwidth (share of the network) than full O2, so you get a slower speed.

If this is true, you could find the average speed on giffgaff even lower than is reported above, if you spend less time on 4G and more time on slower 3G.

Useful link: Read giffgaff customer forums

Our verdict on speed:

A win for Three

"Three is generally faster than giffgaff's parent O2, plus we have doubts that giffgaff customers get the fastest possible data, which makes Three the more appealing option for people wanting reliable speeds."

Compare pricing and deals

Extra network features: Three vs giffgaff

How they keep you talking and browsing in more places.

Some cogs with giffgaff and Three logos

Three have WiFi calling, 4G calling and free hotspots

Three inTouch banner

Get WiFi calling

at Three.co.uk
(opens in new window)

The main 3G signal that Three uses to bring you phone calls and text message is on high frequencies that can sometimes struggle to get indoors if you're not near a transmitter or live in an old building with thick walls.

To make up for this, Three have two extra bits of technology to boost your signal indoors: WiFi calling and 4G calling, which Three call 4G Supervoice. giffgaff have neither of these.

What's good about Three's inTouch WiFi calling is that it supports loads of phones (check their latest list here). It also works on pay monthly and pay as you go plans.

If you travel a lot around London, Three take part in the free WiFi on the Underground scheme, which lets you log in once and automatically get free WiFi when you're travelling around the network.

Useful link: Three's network features guide

giffgaff don't have most the extra features major networks have

giffgaff free WiFi banner

How to log in

at giffgaff.com
(opens in new window)

It's a good job that the lower frequencies that giffgaff's 2G and 3G calling signal is broadcast on are better for decent indoor coverage, because they don't have any of the extras that would otherwise improve it.

There's no WiFi calling or 4G calling on giffgaff (even though their parent O2 offer both). So if you're indoors with no signal, you won't be able to make a call (unless you use WhatsApp or similar apps).

You will at least now get free WiFi access on the Underground and at 8000 O2 WiFi locations on giffgaff with all their deals. You'll have to download to the giffgaff app and play with some settings but you'll be automatically connected after that.

Overall, it's very much a low-frills experience on giffgaff. Minutes, texts and data to use on a regular mobile network, without extra features to keep your calls connected where signal can't reach.

Useful link: How to get free WiFi on giffgaff

Our verdict on extra network features:

Clear win for Three

"Joining a main network like Three brings you the benefit of more comprehensive ways to keep your phone connected for calls than smaller providers like giffgaff, whose low prices mean fewer features."

Compare pricing and deals

Comparing giffgaff and Three benefits

Roaming: how giffgaff and Three compare

Can giffgaff match Three's Go Roam?

A globe with giffgaff and Three logos

Inclusive roaming on Three is more comprehensive

Flags of new Three roaming destinations

See all 71 countries

at Three.co.uk
(opens in new window)

Like every network in the UK, Three offer roaming in the EU at no extra cost. That applies whether you're on pay monthly or pay as you go - SIM only or phone deal.

Three go a step further than giffgaff (and every other network) by giving you an extra 23 worldwide countries at no extra cost on all their pay monthly plans and pay as you go add-ons (see all 71 destinations here).

In those countries, you'll be able to be able to use up to 3000 minutes, 3000 texts and 19GB data out of your regular data allowance before you get charged anything extra (varies per country, see full terms here).

The only downside is that Three reserve the right to put 3G speed limitations on your data while you're abroad, which will curb your usage by making data-hungry things like video watching harder.

Useful link: Read our review of Go Roam

You'll also get free easyJet upgrades on pay monthly

Three travel swagger banner

How upgrades work

at Three.co.uk
(opens in new window)

Three are a network full of surprising extras. And one nice touch related to roaming is their Hands Free easyJet upgrade perk that you get with all of their pay monthly deals.

When you fly from UK airports with the airline, you'll be able to check an item of hand luggage for free, get prioritised boarding and have your luggage come out the other end sooner.

The idea is to make your journey through the airport as easy as possible and the benefit would normally cost £5 per leg from easyJet. But it's free for Three pay monthly customers.

The main limitation is that it only works at UK airports (so not on your return journey abroad) and it only works for the Three customer, not everyone that's travelling with you.

Useful link: Full offer terms and conditions at Three.co.uk

There's much less inclusive roaming on giffgaff

giffgaff roaming banner with flags

Check roaming costs

at giffgaff.com
(opens in new window)

As you'd probably expect from a no-frills provider like giffgaff, they don't really go beyond the legal requirement to offer roaming in the EU at the same cost as usage in the UK.

That's nothing to sniff at. It's not like giffgaff are priced like they're giving you loads of free extras. You'll still be able to use your monthly bundle in all of the countries listed here.

You'll also get 4G speeds wherever available too. It just means that if you're going elsewhere in the world, you'll need to turn data roaming off or curb your usage.

Charges in non-EU countries can run as high as a ludicrous £5000 per GB (so check costs before you leave to avoid burning straight through your credit).

Useful link: giffgaff's roaming fair usage policy

Our verdict on this topic:

A win for Three

"Even if you take one trip to somewhere like the USA per year, being able to use your phone without paying the extortionate roaming costs on Three will be worth its weight in gold to some people. Go Roam is still our favourite roaming scheme."

Compare pricing and deals

Benefits you get on giffgaff but not Three

Advantages to joining giffgaff over Three

giffgaff logo, greater than symbol and Three's logo

Earn money for getting people to join giffgaff

giffgaff's recruiter scheme

How it works

at giffgaff.com
(opens in new window)

Since launching in 2009, one of the ways giffgaff has grown so fast is through their refer a friend Payback scheme, which gives customers £5 each time they get a friend to join the network.

You can order free SIMs from giffgaff to give to your friends. If they activate it and top up with at least £10, they'll receive £5 free credit and you'll get £5 too.

You can take the £5 as free credit, as cash paid twice a year into a Paypal account, or donate it to charity. You can also earn payback for helping out on giffgaff's customer forum by answering questions.

This is a clever win-win-win arrangement, where you can earn yourself some money on the side, your friend gets free credit and giffgaff get new customers.

Useful link: Make money recruiting for giffgaff

Benefits you get on Three but not on giffgaff

Reasons you might join Three over giffgaff

Three logo, greater than symbol, giffgaff logo

Unlimited streaming data with Go Binge

Three Go Binge banner

Read Three's guide

at Three.co.uk
(opens in new window)

Join Three on a pay monthly SIM only plan or phone contract with 12GB data or more and you'll automatically get their Go Binge benefit included with your deal.

Go Binge is essentially an unlimited data allowance in the UK to use particular streaming and social media services as much as you like, without eating into the regular data that comes with your deal.

Here's Three's current cheapest SIM only deal with the benefit:

The scheme covers big-name streaming providers like Netflix and Apple Music (see the full list of apps here), plus Snapchat. It's worth noting you don't get the subscriptions themselves free, just the data the apps use.

If you've ever put off watching videos because you're worried about the data usage, Go Binge does away with that worry. At 1GB data usage per hour to watch Netflix, the savings can add up fast for regular viewers.

Useful link: Our guide to all free streaming data schemes

Our verdict on other benefits:

Win for Three

"Three are set up to give you lots for your money. giffgaff are set up to give you just the basics for not much money. The overall package on Three is worth more but some people will want to keep it simple with giffgaff."

Compare pricing and deals

Comparing giffgaff and Three's deals

Special offers on giffgaff and Three

What's in each network's promotions this month?

Special offer ribbon with giffgaff and Three logos

£5 free giffgaff credit with your first £10 top up

giffgaff free credit offer

Get £5 free credit

at giffgaff.com
(opens in new window)

On SIM only, giffgaff don't really tend to have big discounts or promotional plans ever. But you can get £5 of free credit when you first sign up.

Use our special order link here, top up with at least £10 (or buy a goodybag for £10 or more) and giffgaff will automatically add £5 of welcome credit to your account.

If you're after a smartphone, you can use the £5 free credit offer. See giffgaff's latest phone contract pricing here.

Useful link: Get free credit on giffgaff now

Hidden £18 unlimited data deal on Three

Three's hidden unlimited data deal

See full offer

at Three.co.uk
(opens in new window)

Pay just £18 a month for Three's hidden unlimited data SIM only deal:

This deal is better value than the 24‑month plan currently being advertised with six months at half price, which averages out to £19.25 a month over the course of the contract.

Or if you don't need that much data, it's worth looking at Three's hidden 8GB for £8 offer or 12GB for £10 deal.

If it's a phone contract you're after, be sure to check you can't get a better deal with our hidden phone offer page here.

Useful link: See all latest Three offers

SIM only: pay monthly plans on giffgaff and Three

Use our comparison tool below to see how giffgaff and Three's monthly plans compare:

SIM card with Three and giffgaff's logos
Deal options >
Mins, texts and data >
Data speed (4G or 5G) >
Max contract length >

Close options

Minutes

0+

Texts

0+

Data

0MB+

Done

Minimum data speed

Any
4G
5G
Done

Maximum contract length

Any
1 month
12 months
Done

Close filters

Choose which networks you'd consider:

Three logo
BT Mobile logo
EE logo
giffgaff logo
ID logo
Lebara logo
O2 logo
Plusnet Mobile logo
Sky logo
SMARTY logo
Talkmobile logo
Tesco logo
Virgin Mobile logo
Vodafone logo
VOXI logo

Our verdict on SIM only plans:

No clear winner

"If you're after a short 1-month deal with a moderate amount of data, giffgaff tend to be better value. If you're willing to commit to 12 months and want a bigger data deal, Three become more competitive."

Compare pricing and deals

Unlimited data options on Three and giffgaff

Is Always On as good as Three's unlimited data?

Phone icon with giffgaff and Three logos

Unlimited data on Three has fewer restrictions

Three unlimited data SIM only banner

Get unlimited data

at Three.co.uk
(opens in new window)

If you look at Three's terms and conditions for their unlimited data plans here, you'll see there is in theory a limit of 1000GB data per month before they'd get suspicious you were using your plan not just for personal use.

Three say that even if you used your phone for every minute of the day, you'd still not get to that amount. They also won't slow you down while you're in the UK. And you can even use it for tethering.

The only real restrictions apply when you take your unlimited data plan abroad. Depending on where you go, there are limits of the monthly data you can use and potentially your speed too (read more here).

You can get unlimited data on Three with a phone contract, a pay monthly SIM only deal, or even as a pay as you go add-on too (you'll sometimes see it branded as All-You-Can-Eat data).

Useful link: Read our unlimited data plan rankings

giffgaff's Always On isn't proper unlimited data

giffgaff Always On SIM only plan

Read full terms

at giffgaff.com
(opens in new window)

The closest product giffgaff has to Three's All-You-Can-Eat is their goodybag with 'Always on' data. This has an unlimited element to it because there's no upper amount of gigabytes to overshoot and be charged extra for.

It can't be described as unlimited data though (and giffgaff don't describe it as unlimited) because you don't get all data at the same speed:

Once you've used 80GB at their full 4G speeds, a speed cap is put in place that limits you to downloading at 2G speeds (384 kbps), at most times of day. Heavy data users could easily overshoot this.

But if you're just after the re-assurance that you can't be charged for going over a limit, 'Always on' offers a low-cost solution that's usually cheaper than Three (but check SMARTY's price here first though).

Useful link: Read full 'Always on' details on the giffgaff website

Our verdict on unlimited data:

A win for Three

"If you're serious about data usage on your phone, you'll find giffgaff's 2G speeds after 20GB use unworkable. On Three, you'll get it all at their best possible speeds in the UK."

Compare pricing and deals

Phone contracts: giffgaff vs Three

Which network has better deals on smartphones

Phone icon with giffgaff and Three logos

giffgaff's contracts are generally more flexible

giffgaff phone options

How it works

at giffgaff.co.uk
(opens in new window)

All of giffgaff's phone contract are based on taking out credit agreements (basically loans) for the cost of your phone and combining that with a monthly Goodybag (your minutes, texts and data).

Although you have to take a Goodybag in your first month, after that you can just keep paying giffgaff for the phone only and use another network's SIM in it. Or you can change plans each month too.

It's also flexible when you sign up. There's normally about four choices of up front payment. And you can pay the loan off faster without being penalised too if you want. It's a very flexible system overall.

Three's phone contracts are more conventional 24-month ones with no finance - although some models do have a 36-month finance option now too. These are more about spreading the cost than giving flexibility.

Useful link: See full giffgaff phone range

giffgaff and Three compete closely on price

Screenshot of our phone deal finder

Compare phone contracts

at simsherpa.com
(opens in new window)

Basing your phone contracts on finance normally lets mobile networks offer cheaper deals than those that don't, mainly for accounting reasons for the network. So how do giffgaff compare with Three?

On smaller data plans, we expect giffgaff to almost always work out cheaper than Three. But once you move up into larger plans (20GB upwards), Three start to give giffgaff a run for their money.

Our phone comparison tool here lets you choose just giffgaff and Three phone deals to compare. The best way to find out is to use that to find the model you're after.

Useful link: Compare phone deals

Our verdict on this topic:

Win for giffgaff

"giffgaff's prices are normally cheaper than Three's for phones and their contract structure offers more flexibility too. Make sure you understand the financial agreement you're entering with giffgaff though."

Compare pricing and deals

Basic pay as you go: Three vs giffgaff

How they compare if you just want to pay per minute, text and MB data

Pay as you go top up logo with Three and giffgaff logos

Three's basic rates are cheaper than giffgaff's

Three's pay as you go rates

Get a free SIM

at Three.co.uk
(opens in new window)

Three have now got rid of their popular 321 plan, which offered nearly market-leading basic pay as you go rates. In our comparison of the cheapest pay as you go SIMs, Three now come third for value ahead of giffgaff.

Their pay as you go is now aimed mainly at getting you to buy monthly bundles but you can still just top up with credit and pay for what you use at these rates:

It's pretty good for infrequent users. You just have to do something that costs money at least every 180 days (like send a text) to keep the SIM active. Otherwise credit never expires.

You also get the network benefits of WiFi calling and 4G calling with Three's pay as you go. You'll only get the extra worldwide roaming benefit if you buy one of the monthly add-ons. Otherwise it's Europe only.

Useful link: Full details on Three's pay as you go SIMs

giffgaff's rates are more expensive than Three's

giffgaff's basic pay as you go rates

Order a free SIM card

at giffgaff.com
(opens in new window)

Compared to Three, giffgaff's basic rates are a little pricier but are still the cheapest option on a provider using O2 network (O2 scrapped their Classic PAYG tariff):

There's the same requirement to do something chargeable every 6 months on giffgaff as Three. As long as you do that, there's no credit expiry on giffgaff.

One nice bonus if you've got friends and family on giffgaff is that you'll get free giffgaff to giffgaff calls to them, as long as you top up at least every 3 months. This is one way round giffgaff's high per minute charge.

Useful link: All pay as you go rates on giffgaff

Our verdict on this pay as you go:

Win for Three

"Three's basic rates are cheaper than giffgaff for calls and you get the benefits of WiFi calling / 4G calling that giffgaff don't offer."

Compare pricing and deals

Don't miss these special offers

giffgaff hidden £5 free credit offer

Latest giffgaff offer

Top up your new SIM with at least £10 or buy a goodybag of the same value and get £5 free credit: only when you order via our special invite page.

See how the offer works > opens in new tab

Three's hidden £18 unlimited SIM

Three's hidden unlimited data deal

Pay only £18 a month for unlimited everything with Three's hidden £18 a month unlimited data SIM only offer (12 month contract).

See all our hidden Three offers > (opens in new tab)

Other Three comparisons

Comparing Three and EE

Three vs EE

Read Three vs EE guide

Comparing Three and O2

Three vs O2

Read Three vs O2 guide

Comparing Three and Vodafone

Three vs Vodafone

Read our Three vs Vodafone guide

Comparing Three and BT Mobile

Three vs BT Mobile

Read Three vs BT Mobile

Comparing Three and SMARTY

Three vs SMARTY

Read our Three vs SMARTY guide

Comparing Three and Virgin Mobile

Three vs Virgin Mobile

Read our Three vs Virgin Mobile guide

Other giffgaff comparisons

Comparing giffgaff and SMARTY

giffgaff vs SMARTY

Read giffgaff vs SMARTY guide

SIM Sherpa can help you find your next SIM only deal

network logos