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Compare 5G SIM only deals

5G is the next generation of smartphone technology. Now well into its rollout, there are a huge range of exciting 5G smartphones already available. But to use a 5G phone, you’ll need to pick up a 5G SIM card.

Uswitch tips

How do I switch and keep my number?
Thumbnail, graphic - SIM cards from different networks. Uswitch compares deals from Lebara Mobile, O2, iD Mobile, Three, Vodafone and others.

1. Choose your new deal
Select a deal below and click through to the network’s site.

2. Get your PAC code
You’ll need a special code to keep your number when you switch. It's quick and free:
Text PAC to 65075 to receive your code.

3. Give the code to your new network
Contact the new network after signing up to provide them with your PAC code, which will begin the process and will automatically cancel your previous plan. Alternatively, you can enter the PAC code when signing up on the network’s site.

List of SIM Only deals

Sorted by: Uswitch Promoted

  1. O2 SIM deal

    O2 logo

    £7.99 a monthMonthly cost will rise every April by inflation (RPI) plus 3.9%.

    12 month contract

    30 GBof 5G data

    • EU roaming included
    • O2 Priority Tickets
    • Best Network for Roaming
  2. O2 SIM deal

    O2 logo

    £5.99 a monthMonthly cost will rise every April by inflation (RPI) plus 3.9%.

    12 month contract

    10 GBof 5G data

    • EU roaming included
    • O2 Priority Tickets
    • Best Network for Roaming
  3. Lebara Mobile SIM deal

    Uses Vodafone's Network

    Lebara Mobile logo

    £2.78 a month for 3 months, then £6.95

    No contract

    15 GBof 5G data

    Uswitch Exclusive
    • No price rise in 2024
    • EU roaming included
    • Most Popular Mobile Network
  4. O2 SIM deal

    O2 logo

    £9.99 a monthMonthly cost will rise every April by inflation (RPI) plus 3.9%.

    12 month contract

    60 GBof 5G data

    • EU roaming included
    • O2 Priority Tickets
    • Best Network for Roaming
  5. Lebara Mobile SIM deal

    Uses Vodafone's Network

    Lebara Mobile logo

    £3.58 a month for 3 months, then £8.95

    No contract

    30 GBof 5G data

    Uswitch Exclusive
    • No price rise in 2024
    • EU roaming included
    • Most Popular Mobile Network
  6. Talkmobile SIM deal

    Uses Vodafone's Network

    Talkmobile logo

    £8.00 a month

    1 month contract

    50 GBof 5G data

    • No price rise in 2024
    • EU roaming included
  7. SMARTY SIM deal

    Uses Three's Network

    SMARTY logo

    £6.00 a month

    1 month contract

    20 GBof 5G data

    Uswitch Exclusive
    • No price rise in 2024
    • EU roaming included
    • Best SIM Only Network
  8. SMARTY SIM deal

    Uses Three's Network

    SMARTY logo

    £15.00 a month

    1 month contract

    Unlimited5G data

    • No price rise in 2024
    • EU roaming included
    • Best SIM Only Network
  9. Lebara Mobile SIM deal

    Uses Vodafone's Network

    Lebara Mobile logo

    £1.48 a month for 3 months, then £4.95

    No contract

    5 GBof 5G data

    Uswitch Exclusive
    • No price rise in 2024
    • EU roaming included
    • Most Popular Mobile Network
  10. Lebara Mobile SIM deal

    Uses Vodafone's Network

    Lebara Mobile logo

    £9.98 a month for 3 months, then £24.95

    No contract

    Unlimited5G data

    Uswitch Exclusive
    • No price rise in 2024
    • EU roaming included
    • Most Popular Mobile Network
Can't find what you're looking for?

Uswitch services are provided at no cost to you, but we may receive a commission from the companies we refer you to. If a deal is "promoted" on Uswitch's tables, then it has been lent additional visibility as a result of us securing exclusivity on a great deal, or a commercial agreement to showcase what we believe to be market-leading value to consumers. Learn more about how our site works.

Please note: Mobile networks may increase monthly prices in line with the retail or consumer price index each year during the length of your contract. Please refer to individual network's terms and conditions before signing up.

Author: Ray Ali | Last updated: 7 June 2024

What is a 5G SIM?

5G is the latest generation of cellular technology. In simpler terms, the wireless network powers your phone's internet when you're out and about and not connected to Wi-Fi.

5G was preceded by 3G (which introduced the dawn of the smartphone) and 4G (which took mobile speeds to new limits). 4G ushered in the smooth online mobile experience most of us are now used to, but 5G takes it to a new level with ultrafast download speeds and buffer-free streaming in full HD and (sometimes) 4K.

To use 5G, you need a 5G SIM, a 5G-compatible phone, and a 5G-connected area.

Most major UK mobile phone networks have now switched their 5G services on throughout the UK.

Can I get a 5G SIM card with unlimited data?

One way to ensure you never run out of data on 5G is to get a deal that offers unlimited data, and thankfully, there are unlimited 5G data deals from Vodafone, Three, and more.

However, these deals tend to be more expensive than limited options. So it's good to use a mobile data calculator to figure out how much data you usually use and, therefore what budget you can keep to.

What's the cheapest 5G SIM plan?

There's a wide range of cheap 5G SIM only deals to choose from.

Remember that if you use 5G to stream and download, you might end up using a lot of data quite quickly. And charges for going over your data cap can sometimes be expensive.

So it's worth looking out for a deal with enough mobile data to suit your needs.

When is 5G coming to my area?

The 5G era is well underway, with most major 5G networks running throughout the UK's urban and suburban areas. Let's see how they all stack up.

Which networks offer 5G SIM cards?

Vodafone

Vodafone's 5G launched on 3 July 2019, with its service available at first in Birmingham, Bristol, Cardiff, Glasgow, Manchester, Liverpool and London.

It’s now available in around 138 UK locations, including Birkenhead, Blackpool, Bournemouth, Guildford, Newbury, Portsmouth, Plymouth, Reading, Southampton, Stoke-on-Trent, Warrington and Wolverhampton. It's also available in 240 different EU roaming locations.

Vodafone has made a big statement with its 5G offering by shaking up the traditional 'data allowance' system and instead offering unlimited data in a tiered speed system, similar to what you might get your broadband.

Vodafone has also launched 5G and unlimited data for all its pay-as-you-go customers. This enables people to benefit from the blistering speeds of 5G without the confines of a monthly contract.

Check out our Vodafone SIM only deals

Three

After a bit of a delay, Three's 5G was launched in February 2020. The rollout initially covered 66 UK locations, including London, Leeds, Glasgow, Bristol, Manchester, Liverpool, Aberdeen, and many more. At the time of writing, it’s now extended to 303 locations, so that’s excellent coverage.

Three has dubbed its 5G as the ‘real 5G’ because it has up to twice the 5G spectrum of other networks. In theory, that means downloading movies, music, and gaming online will be far faster on Three than on its competitors.

Three’s 5G also comes at no extra cost. All of Three’s SIMs are 5G ready as standard, so all you’ll need is a 5G smartphone, and you’re good to go.

The company has also launched a 5G home broadband service in London. EE and Vodafone are offering home routers utilising 5G, as the need for traditional landline connections looks set to dissipate in the next few years.

Check out our Three SIM only deals

O2

O2 began its 5G rollout in October 2019. It was initially launched in Belfast, Cardiff, Edinburgh, Leeds, London, and Slough, and it now spans over 200 UK locations.

Check out our O2 SIM only deals

Giffgaff

Giffgaff currently has 5G switched on around 200 UK cities and towns. Giffgaff's bundles and packages allow you to pick and choose how much data you use, making its 5G offering one of the most flexible on the market.

Check out our Giffgaff SIM only deals

Sky Mobile

Sky Mobile's 5G is switched on in 2000 locations throughout the UK, such as London, Belfast, Leeds, Edinburgh and more. Sky Mobile’s 5G is free to customers, providing they sign up for the Sky VIP programme - free to join.

Adding 5G to a Sky Mobile plan will cost an additional £5 a month without a Sky VIP membership.

Check out our Sky Mobile SIM deals

Tesco Mobile

Tesco Mobile has launched the start of its 5G offering, which is live in 2000 cities around the UK.

Tesco Mobile customers in cities and towns including Bournemouth, Cambridge, Milton Keynes, Wolverhampton, Coventry, Glasgow, Leeds, and London can now access superfast 5G connection speeds.

Check out our Tesco Mobile SIM only deals

Does my current SIM support 5G?

Existing 4G or 3G SIM cards can’t connect you to 5G.

So, unless you already have a 5G SIM card, you’ll need to get a new SIM if you want to connect to 5G on your smartphone.

Is 5G available in the UK?

Yes, 5G is available in the UK in a number of towns and cities. Not all areas are fully connected, but the following cities should offer 5G in at least some areas.

Updated 4 October 2023
AberdeenBarnsleyBasildonBath
BedfordBelfast CityBirminghamBlackburn
BlackpoolBournemouthBradfordBrighton
BrimingtonBristolCardiffCarlisle
ColchesterCoventryDerbyDoncaster
DundeeEdinburghGlasgowIpswich
LeedsLeicesterLincolnLiverpool
LondonLutonManchesterMiddlesbrough
Milton KeynesNewcastleNorthamptonNottingham
OxfordPeterboroughPlymouthPortsmouth
PrestonReadingSheffieldSlough
SouthamptonSouthend-on-SeaSunderlandSwindon
WiganYork

FAQs

Read more...

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