5G roaming isn't currently available with O2, but you'll still be able to roam on our 3G and 4G networks.

Our 5G network is a data service and doesn't impact calls. For better call quality, you should activate Wifi and 4G Calling.

5G may have limited indoor coverage to begin with. This is because 5G uses high frequency radio waves (spectrum) which don't travel as far. As low frequency spectrum is added and more 5G cells are built, indoor coverage will improve.

Each network operator has their own 5G roll out plans and approaches. O2 5G is live in areas of 24 towns and cities, with plans to increase this to 50 by summer 2020. You can use our coverage checker to find out if 5G is available in your area.

If you’re in an area without 5G coverage, your device will automatically connect to the best option available (3G, 4G or wifi).

We now have 5G in parts of most major UK towns and cities, as well as lots of smaller towns and villages. To see whether 5G has arrived in your area visit our coverage checker.

The data speeds you get on our network will be affected by lots of different factors, like the type of mast you’re connected to, how many people are using the network in your location, how far away you are from the mast, or buildings and hills obstructing coverage. Because of this, speeds will change in different places.

You can report the problem on the status checker pages, through the My Network app.

The coverage checker is based on coverage predictions and can never be 100% accurate, because of things like trees, buildings and hills affecting actual coverage. We try to make sure our predictions are as accurate as possible and have edited the coverage checker to take into account these coverage limitations.

You can use the network status checker or the My Network app to check for any known issues with our network, or to report a problem.

The My network app gives you information on coverage and network status. You can report issues or get updates on known issues. We'll let you know when the problem is fixed and why there were delays, and tell you what’s happening next and when.

The app also lets you set up permanent watch-points for places you use our network regularly, such as home or work. You'll then be told of any planned work or network issues without having to check the app or website.

To help us improve the experience for you and other customers, you can sign up to give us mobile measurement data, which means we can collect network insight to spot issues more quickly.

Using the app means less effort for you. It gives you notifications on known issues and can provide updates on reported problems. You can also set up alerts for areas you're in regularly, like home or work.

The app can be downloaded from the App Store or Google Play. Once installed, you can open it normally, or get to it from the network page links in My O2.

Our aim is to announce 5G has launched in a city, once it's reached a high enough threshold of coverage. At that stage coverage won't be complete across the whole area and we'll continue to roll 5G out. This means that even though you're in a 5G city or town, your area might not have been updated yet.

Mobile networks are built to strict government guidelines in the UK, which O2 adhere to, that are informed by the World Health Organisation. Find out more.

Due to the different nature and construction materials of buildings, indoor coverage for 5G in particular, is very difficult to predict accurately. We prefer not to show you coverage levels that might not be accurate.

We recommend you enable Wifi and 4G calling on your device. This means when you’re making a call, you'll still be able to access 3G/4G data services. If you don't have Wifi and 4G Calling enabled, you won't be able to access data while you're on a call.

You'll see the 5G icon on your device when you're in a 5G coverage area, using a 5G device and a 5G sim.

Your device will automatically select the most appropriate technology available (3G, 4G, 5G or wifi, if enabled), for the service or application you're using. In the early stages of 5G rollout, 5G is accessed through our 4G network. Because 5G waves don't travel as far as 4G ones, sometimes you might see a 5G signal indicator, while getting 4G speeds. This is because the phone is accessing the network through the 5G cell site, but is outside the reach of the 5G network, so has automatically switched to 4G instead.

Yes, you'll be able to tether using our 5G network.

Yes, you can turn 5G off through the network settings on your 5G device.

5G is designed to be really efficient, so if you’re using your device in the same way as you would on our 4G network, battery life won't be affected. However, if you choose to download a lot more data over our 5G network, then it's likely to use up the battery quicker.

Yes, your 5G device will be able to use a 4G sim to receive 4G/3G/2G coverage whenever it needs to. But if you want to use our 5G network, you'll need to swap to a 5G sim.

Whether you use 4G or 5G to download a 4GB film, for example, the amount of data used is the same. However with a faster 5G connection it’ll be easier to download more films and therefore use more data.