5G is now standard on UK phones and plans. You rarely pay extra for it, and most handsets sold in the last few years support it. The questions that still matter are whether your phone works with the 5G your network actually offers, how well it reaches inside your home, and what it does to your battery and data use. This guide covers each in plain terms.
Do you need a 5G plan?
Not as a separate choice. All four big networks include 5G on their current plans at no extra cost, and the smaller brands on their networks offer it too. EE has also added 5G to pay as you go. New customers who joined after 10 December 2025 get a 5G ready SIM, and existing customers were due to have 5G by 31 January 2026. See 5G on pay as you go for how those plans work, and SIM only plans with 5G included for fixed terms.
What you do need is a 5G phone. A 4G phone on a 5G plan works, but only at 4G speeds. An older SIM may also need swapping, which your network does free of charge. To see what is on offer, browse plans that include 5G.
What a 5G phone needs
Almost every 5G phone launched since 2021 works on UK networks. Check these points on the spec sheet:
- 5G support at all. Apple phones from the iPhone 12 onwards have it, and so do nearly all current Android models.
- The right bands. UK 5G mainly uses a mid band (n78) for speed in towns and a low band (n28) for wider reach. Phones sold in the UK should support both.
- Standalone 5G, if you want the newest service. Networks list the phones that work with it, and each name has a compatible device list.
- Update support, since a 5G phone that stops getting updates is still a risk. See phones that make the most of 5G and 5G phones that cost less.
Standalone 5G, in brief
The first UK 5G networks leaned partly on 4G equipment. Standalone, or SA, 5G uses a full 5G core with no 4G in the middle. In practice it can mean quicker response times, 5G calling and better handling of busy places. It needs a compatible phone, a recent SIM or eSIM and coverage.
| Network | Standalone 5G | What to know |
|---|---|---|
| EE | Live in hundreds of towns and cities, as 5G+ | Compatible phone and recent SIM or eSIM needed |
| O2 | Live in hundreds of towns and cities | Offered on eligible plans with a compatible phone, at no extra cost |
| Vodafone and Three | Vodafone says its coverage passed half the population in summer 2026, and the VodafoneThree rollout continues | Check phone and plan eligibility |
| Brands on those networks | Varies. Sky Mobile began limited support in August 2026. | Often stricter phone or plan rules than the host network |
Each network brands standalone 5G differently, and the lists of towns change often.
How far does 5G reach?
Ofcom’s Spring 2026 update, with data to January, found predicted 5G coverage outside premises of between 76% and 94% for each network. Coverage from all four networks together rose from 47% to 64% in six months. Standalone coverage is lower, and Ofcom’s figures put it between roughly half and over four fifths outdoors for the three networks that have launched it. Nearly all premises still get 4G from every network. For how each network compares, see how the networks compare on 5G speed.
Why 5G can be weak indoors
Mid band 5G is fast but loses strength through brick, concrete and modern glass. Low band reaches further and goes through walls, but carries less data. So a phone can show 5G in your living room while using a weak signal. In some buildings, 4G on a lower band is actually faster than mid band 5G.
If this happens, try these steps:
- Move nearer a window, and test again.
- Turn on Wi-Fi calling and use home Wi-Fi for data.
- Test outdoors, to see whether the problem is the building.
- Check whether 5G reaches your street.
Battery and data
5G can use a little more power than 4G, mostly when the signal is weak and your phone keeps searching. On an iPhone, choose 5G Auto under Cellular Data Options. On Android, look for Adaptive Connectivity or a 5G power saving setting. Using Wi-Fi at home helps more than any setting.
Faster downloads make it easy to use more data without noticing, so watch your allowance. Read about how 5G can raise your data use before you pick a size.
FAQs
Do I need a new SIM for 5G?
Usually not. Older SIMs from before 5G launched may need swapping, and some standalone features need a recent SIM or eSIM. Your network can replace it free.
Is 5G safe?
UK public health and regulatory bodies say 5G emissions sit well within international safety guidelines. This is the same conclusion the World Health Organization has reached.
Will 4G be switched off?
4G works on all four networks and will keep working. The 3G switch off has finished, but I found no announced date for 4G.