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Unlimited 5G Data SIM plans

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Triple SIM (Standard, Micro and Nano)

Micro SIM card
Three
Unlimited Data
12 month contract
£16.00 a month
12 month contract
£16.00 a month
Exclusive Deal

Triple SIM (Standard, Micro and Nano)

Micro SIM card
Vodafone
Unlimited Data
12 month contract
£20.00 a month
12 month contract
£20.00 a month
Max speeds 2mbps

Triple SIM (Standard, Micro and Nano)

Micro SIM card
Three
Unlimited Data
24 month contract
£20.00 a month
24 month contract
£20.00 a month
6 months half price

Triple SIM (Standard, Micro and Nano)

Micro SIM card
Vodafone
Unlimited Data
24 month contract
£22.00 a month
24 month contract
£22.00 a month
Max speeds 2mbps

Triple SIM (Standard, Micro and Nano)

Micro SIM card
Tesco Mobile
Unlimited Data
18 month contract
£22.50 a month
18 month contract
£22.50 a month

Triple SIM (Standard, Micro and Nano)

Micro SIM card
Vodafone
Unlimited Data
12 month contract
£23.00 a month
12 month contract
£23.00 a month
Max speeds 10mbps

Triple SIM (Standard, Micro and Nano)

Micro SIM card
Three
Unlimited Data
1 month contract
£24.00 a month
1 month contract
£24.00 a month

Triple SIM (Standard, Micro and Nano)

Micro SIM card
Vodafone
Unlimited Data
12 month contract
£25.00 a month
12 month contract
£25.00 a month
Fastest available speeds
  • Overview

Overview

5G unlimited data plans are the ultimate way to get the most out of your phone, as you get a combination of the fastest possible speeds through 5G, and no limits on how much data you can use.

It’s the perfect pairing, as 5G offers not just unparalleled speed for streaming, downloading and more, but also low latency, and it even unlocks the potential for whole new use cases.

But it’s only as good as your data limit – 5G paired with a 1GB allowance for example would severely limit your ability to make use of its superfast speeds.

The good news there is that many networks now offer unlimited data. Some have been doing this for years, while others launched unlimited data plans at around the same time as 5G, recognising how important this would be.

But the terms and restrictions vary from network to network, and there are still some 5G networks that don’t offer unlimited data at all. So with all that in mind we’ve created this guide, highlighting your unlimited data 5G options.

Which networks offer 5G unlimited data?

At the time of writing, EE, O2, Three, Vodafone, VOXI and BT Mobile all offer some form of unlimited 5G data. Note that some other networks also offer unlimited data, but they don’t yet offer 5G.

EE

At the time of writing, EEO2ThreeVodafoneVOXI and Tesco Mobile all offer some form of unlimited 5G data. Note that some other networks also offer unlimited data, but they don’t yet offer 5G. That includes BT Mobile, which offered 5G for a while but isn’t currently making it available to new customers.

EE

EE offers unlimited 5G data to both new and upgrading customers on both Pay Monthly and SIM Only plans. If you’re buying a handset or Smart plan then 5G comes as standard.

There’s no speed cap on EE’s 5G plans, with the network claiming that you can expect 5G speeds that average around 100-150Mbps more than its average 4G speeds, which should put them at around 130-240Mbps. However, peak speeds can theoretically exceed 1Gbps.

While there’s no speed cap, EE does have a fair use policy, which states that if you regularly tether 12 or more devices or use over 1,000GB of data in a month then it may consider this non-personal use and could move you to a more suitable plan. These sorts of restrictions shouldn’t affect many users though.

EE’s 5G unlimited data plans last 24 months whether you opt for SIM Only or a Pay Monthly plan with a 5G phone. Note that at the time of writing EE 5G is not available on Pay As You Go, and nor is it available while roaming.

However, you will get some extras with your 5G plan. Specifically, you’ll get a choice of one or more of the following: an Amazon Prime Video subscription, access to additional free roaming locations through Roam Further, a BritBox subscription, Apple Music, or the ability to stream BT Sport on your phone in HDR. If opting for Pay Monthly with an Apple handset then some of those will be swapped out for Apple TV Plus and Apple Arcade.

EE SIM deals

O2

O2 offers 5G with unlimited data on both Pay Monthly and SIM Only. One area where O2 provides more options than most networks though is how long its unlimited data Pay Monthly contracts last. You can choose anything from 3 to 36 months, with prices adjusting accordingly, and these plans are available to both new and upgrading customers.

There’s no speed cap on O2’s 5G plans. O2 hasn’t said exactly how fast its 5G service is, but we’d expect average speeds in the range of 150-250Mbps, as that’s what rivals typically promise.

O2 does however have a fair usage policy, which states that if you use 650GB of data twice in a six-month period, or if you regularly tether to 12 or more devices, then it may investigate your usage.

There’s not currently 5G roaming on O2, but you can access O2’s network of Wi-Fi hotspots and its Priority app, which gives you various discounts, competitions, freebies and the chance to buy certain event tickets before they go on general sale.

O2 SIM deals

Three

All of Three’s mobile plans are 5G-ready. That means you just need a 5G device and coverage, and then you’ll instantly be able to access 5G at no extra cost, whether on Pay Monthly, SIM Only or Pay As You Go.

Three was also one of the first UK networks to offer unlimited data, and you can get it on both Pay Monthly and SIM Only plans, and there’s even an unlimited data add-on for Pay As You Go and the option to get 5G home broadband with unlimited data.

Three doesn’t offer 5G roaming, but early tests suggest its peak 5G speeds in the UK are even higher than rivals, so this could be the network for speed.

There’s currently no fair usage policy to worry about with unlimited data on Three either.

Other things to note are that SIM Only plans last 1, 12 or 24 months, while Pay Monthly plans are all 24 months long. The main extra you get on Three is free roaming in numerous locations beyond Europe – but as noted above this isn’t currently offered at 5G speeds.

Three SIM deals

Vodafone

Vodafone offers a number of unlimited data plans. These are available on both Pay Monthly (with plans lasting 24 months) and SIM Only (on plans lasting 1, 12 or 24 months) and to both new and upgrading customers, but it’s slightly less obvious which ones include 5G than with other networks, as rather than saying a plan is ‘5G’ or ‘4G’, they instead say how fast they are.

In reality, the only ones that truly give 5G speeds are the ‘Unlimited Max’ plans, which offer the ‘fastest available’ speeds, so this is what you’ll want. Be aware that even if you buy a 5G handset, some of the plans you’ll be offered with it will have restricted speeds, so again, make sure it’s Unlimited Max that you opt for.

As for what speeds you can expect on unrestricted plans, Vodafone claims that its 5G speeds will average 150-200Mbps, with peak speeds reaching around 1Gbps.

Vodafone also offers unlimited 5G data with 5G home broadband, and on Pay As You Go. Its fair use policy meanwhile states that use should not exceed that reasonably expected of a reasonable person.

Unlike most networks, Vodafone does offer a 5G roaming service, with 5G offered in a growing number of locations. At the time of writing it’s limited to various towns and cities in Spain, Germany, Italy and the Republic of Ireland.

Beyond 5G roaming, the main benefit on Vodafone 5G is the ability to get a subscription to an entertainment service thrown in with your plan. You can choose from Amazon Prime, YouTube Premium, or Spotify Premium.

Note that these subscriptions aren’t free, as they push up the price of the plan compared to Unlimited Max plans without entertainment, but they are typically cheaper than paying for the subscription separately would be.

Vodafone SIM deals

BT

BT Mobile for a while offered both 5G and unlimited data, however at the time of writing it has stopped offering 5G to new customers.

But if you already have an unlimited data 5G plan on BT then you can keep using it.

VOXI

VOXI offers just one 5G plan at the time of writing and handily it comes with unlimited data. It’s available on both SIM Only and Pay Monthly and in both cases you’re only tied in for 30 days (though in the case of Pay Monthly you’ll still have to pay off your phone of course, even if you change your plan early).

Both new and existing VOXI customers are eligible for this plan and there are no speed restrictions, though VOXI’s fair usage policy notes that it may take action if use is ‘excessive’, damaging to the network, or appears to be commercial in nature.

VOXI hasn’t said exactly how fast its 5G is, but it uses Vodafone’s infrastructure, which means you can probably expect average speeds of around 150-200Mbps, with peak speeds of up to 1Gbps.

VOXI mostly stands out though through its offering of 5G roaming, a service it offers in the same selection of locations as Vodafone (which owns VOXI). That means you can roam at 5G speeds across numerous towns and cities in Spain, Italy, Germany and the Republic of Ireland, at no extra cost. Note that at the time of writing these are the only two UK networks to offer 5G roaming.

VOXI SIM deals

Tesco Mobile

Tesco Mobile offers 5G unlimited data on both SIM Only and with a handset – though it also still offers 4G plans too, so make sure you opt for a plan that says it includes 5G or comes with a 5G phone.

Tesco uses O2’s infrastructure, so its coverage will be the same and its speeds will likely be similar. You can tether with 5G unlimited data, but roaming is limited to 4G speeds.

Being an MVNO (mobile virtual network operator) Tesco Mobile doesn’t have all the extras of the big networks, but the flip side is its prices are often lower, so if you want a 5G unlimited data SIM plan on a budget then it’s worth keeping an eye on.

Pay As You Go

If you want unlimited 5G data on Pay As You Go then your options are currently more limited. In fact, your only options are Three and Vodafone at the time of writing, both of which offer an unlimited data Pay As You Go pack with 5G speeds, plus unlimited minutes and texts.

Though at the time of writing Three’s is a lot cheaper, coming in at £30 per month while Vodafone’s is £50.

Which networks offer 5G but not unlimited data?

If you’ve decided you don’t need unlimited data but do want 5G, then you may also want to consider the network below, which at the time of writing is the only UK network to offer 5G with no unlimited data option.

Sky Mobile

Sky Mobile currently offers 5G plans with up to 30GB of data on both Pay Monthly and SIM Only – so some way short of unlimited. Plans for the latter last 12 months while the former last a choice of 12 or 24 months.

Sky Mobile’s speeds aren’t capped and should be similar to O2’s, since it uses that network’s infrastructure. 5G roaming isn’t currently offered by Sky Mobile, but you do get to roll over unused data from one month to the next, and if you’re a Sky TV customer then you can watch Sky apps on your device without it coming out of your data allowance.

Frequently asked questions (FAQ)

Do I really need unlimited data?

That entirely depends on your usage. If you’re using a lot of data now, or envisage 5G dramatically changing the way you use your phone, then it could be worth having.

If on the other hand you’re a relatively light user then 5G is unlikely to change that – though you’ll still probably want a reasonable data allowance so you can make the most of 5G, but you might be fine on as little as 5-10GB per month.

Unlimited data is mostly useful if you’re streaming or downloading a lot of films and TV shows, downloading lots of large apps or games, or playing games online regularly.

Can I put a 5G SIM in my phone?

You can put a 5G SIM in your current phone and – as long as your phone is unlocked or on the same network – the SIM should work, though if you put it in a 4G handset then you won’t be able to take advantage of 5G speeds.

As with previous generations though it won’t work if your phone is locked to another network. In that case you’ll first need to unlock your handset. The good news is that most networks will unlock your phone on request, either for free or for a small charge.

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

If you’re not in a 5G coverage area then your phone will revert to a 4G, 3G or 2G signal, depending on what coverage is available, just as 4G phones will revert to 3G or 2G when needed.

However, if you don’t live or work in an area that currently has 5G coverage then you might want to wait before getting a 5G SIM deal anyway, since you probably won’t benefit much until you do have coverage.

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

Yes, but of course it will only be able to provide a 4G signal at most. For 5G speeds you’ll need a 5G handset.

Can I keep my number?

Yes, and the process is simple.

If you’re upgrading on your current network then your number will stay the same anyway, but if moving network you just need to request your PAC code from your old network (while the number is still active), then activate your new SIM if you haven’t already, and tell your new network your PAC code and old number.

Requesting your PAC code can be done by texting ‘PAC’ to 65075 from the number that you want to keep. Giving the code to your new network is usually done via on online form, but the exact process will vary from network to network. If in doubt, give your new network a call.

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

Yes, but you will want a data only SIM which only comes with a bundle of data and doesn't have included minutes and texts.

Which networks offer 5G SIM only plans?

There are currently 10 networks offering 5G SIM only deals, which are EE, O2, Three, Vodafone, BT Mobile, GiffGaff, Sky Mobile, Tesco Mobile, Virgin Mobile and Voxi.

Networks offering 5G SIM Only plans

EE SIM Only

Vodafone SIM Only

O2 SIM Only

Tesco SIM Only

Three SIM Only

VOXI SIM Only

BT 5G Sky 5G giffgaff 5G
  Virgin SIM Only  
  • EE

EE currently offers a number of 5G SIM Only plans, including an unlimited 5G plan which has no speed or usage restrictions.

Some of EE’s 5G SIM Only plans come with ‘Smart Benefits’ letting you choose between one and three extras that you keep for the duration of your contract.

In most cases you get to choose one benefit from the following options:

Apple Music, BT Sport Ultimate, Amazon Prime Video, BritBox, Roam Further (which lets you roam in select places beyond Europe at no extra cost), and a Video Data Pass (which lets you use select video streaming services without it affecting your data allowance). The last of those isn’t an option on unlimited data plans, since it wouldn’t be of any use.

However, there’s also a ‘Full Works SIM Plan for iPhone’, which lets you instead choose three of the following benefits:

Apple Music, Apple TV Plus, Apple Arcade, BT Sport Ultimate, and Roam Further.

  • Vodafone

Vodafone also offers a number of 5G SIM Only plans, including some with unlimited 5G data.

The plans are available on 24-month, 12-month or 1-month contracts, and all come with unlimited minutes and texts. 

The difference between the Unlimited Lite, Unlimited and Unlimited Max plans is the maximum speed offered. The cheapest are Unlimited Lite plans, which offer speeds of up to 2Mbps (good for browsing, social media and music streaming), the mid-range Unlimited plans offer speeds of up to 10Mbps (enough to stream HD video), while the Unlimited Max plan has no speed restrictions (for superfast downloads and streaming in UHD).

Of these Unlimited plans, only Unlimited Max is capable of true 5G speeds, however Vodafone stands out through also offering 5G roaming in parts of Spain, Italy, Ireland, and Germany. Plus, select plans come with a subscription to an entertainment service (such as Amazon Prime, YouTube Premium or Spotify Premium) thrown in.

  • Three

Three offers a wide range of 5G SIM Only plans. In fact, all of its SIM Only plans are 5G Ready at no extra cost.

Three’s SIM Only plans primarily stand out through being better value than much of the competition, and of course there’s also an unlimited data option. Three also allows you to roam in 71 destinations at no extra cost on all plans.

  • O2

O2 also offers a wide range of 5G SIM Only plans, including some with unlimited data.

Plans also come with the standard O2 extras, such as access to O2 Priority for discounts, freebies, and early gig tickets.

  • Tesco Mobile

Tesco Mobile, which uses O2's network, offers a range of 5G SIM Only plans on 12-month contracts.

At the time of writing these plans all come with 5000 minutes and 5000 texts (so virtually unlimited), and top out at unlimited data.

  • VOXI

VOXI currently offers several 5G SIM Only plans, including one with unlimited data. Opt for one with a data limit and there are also extras to help your data go further, in the form of ‘Endless Video’ (which lets you stream content on YouTube, Amazon Prime Video, Netflix, My5, TVPlayer and UKTV Play without it coming out of your data allowance), and ‘Endless Social Media’, which lets you use Snapchat, Instagram, WhatsApp, Facebook, Twitter, Pinterest and Facebook Messenger without it using your data allowance.

These plans are all just 30 days long, so you aren’t tied into a lengthy contract, and VOXI also stands out through offering 5G roaming in the same places as Vodafone.

  • BT Mobile

BT Mobile’s SIM Only plans all include 5G, and if you’re a BT Halo customer then you can also get unlimited data.

Beyond that, they give you access to BT’s network of 5 million Wi-Fi hotspots – so you can get speedy internet even when you’re not in a 5G area. They also pair well with BT Broadband, with many plans being cheaper if you have that.

  • Giffgaff

As well as 4G plans Giffgaff also offers what it calls ‘Golden Goodybags’, which include 5G.

These come with up to unlimited data, but beyond that Giffgaff mainly stands out simply by offering competitively low prices.

  • Sky Mobile

Sky Mobile also offers 5G on SIM Only, but to get it at the time of writing you have to order a 4G plan and then add 5G through a monthly add on.

Data limits are low compared to some networks, but so are prices, and Sky Mobile comes with handy extras like the ability to roll over your unused data for up to three years, so it doesn’t go to waste, and for Sky TV customers to watch it on mobile without it eating into their data allowance.

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

Yes, a 5G SIM card will work in a 4G phone. However, it will only be able to provide a 4G signal at most. For 5G speeds you’ll need a 5G phone.

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

If you’re not in a 5G coverage area then your phone will revert to a 4G, 3G or 2G signal, depending on what coverage is available, just as 4G phones will revert to 3G or 2G when needed.

However, if you don’t live or work in an area that currently has 5G coverage then you might want to wait before getting a 5G SIM deal anyway, since you probably won’t benefit much until you do have coverage.

Can I keep my number when switching to 5G?

Yes, you can keep your number when switching to 5G and the process is simple.

If you’re upgrading on your current network then your number will stay the same anyway, but if moving network you just need to request your PAC code from your old network (while the number is still active), then activate your new SIM if you haven’t already, and tell your new network your PAC code and old number.

Requesting your PAC code can be done by texting ‘PAC’ to 65075 from the number that you want to keep. Giving the code to your new network is usually done via on online form, but the exact process will vary from network to network. If in doubt, give your new network a call.

What SIM card size do I need?

No matter what network you choose, you should receive a customisable SIM card that can be made to fit a SIM card slot of any size. These are variously called a Multi SIM, Combi SIM, Trio SIM, and other things, but they’re all the same idea, so you don’t need to worry about requesting a specific size or using an adaptor.

What should I consider when choosing a 5G SIM Only contract?

There are a number of important things to consider when choosing a 5G SIM only deal.

One important factor is which network has 5G coverage in your area. You can quickly compare 5G coverage in your area on all networks using our coverage checker.

Another thing to consider is how much data, minutes and texts you need per month. You may end up using more data on 5G than you do currently as you'll be able to stream in higher quality and browse faster. Our helpful guide should help you determine how much data you need. 

Budget is also a consideration and that is why it is important to compare deals across all networks to ensure you get the best deal available.

Beyond allowances, prices and coverage, there are plenty of other things to consider when choosing a network for 5G SIM Only, as they all offer different things.

One obvious point of comparison is free roaming availability, as while they all let you roam for free across most of Europe, some networks also let you roam further, and Vodafone and VOXI even let you roam at 5G speeds in a number of places.

Tethering is another thing you might want to consider if you plan to use your phone to get other devices online, like you would with a 5G broadband device, though most networks now allow this with few to no restrictions beyond your data allowance.

There are then things that are unique to specific networks. For example, some of EE and Vodafone’s plans come with a subscription to an entertainment service of your choice, while O2 offers a Priority app and service full of competitions, freebies, and discounts.

What is the cheapest 5G SIM Only deal?

The cheapest 5G SIM only deal is currently costs £5 a month on Three and gets you 2GB data, 200 minutes and unlimited texts on a 12 month plan. You can compare all the cheapest plans in the deals table above.

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