- What should I do if I’m having a network issue?
Slow data speeds? Calls keep dropping? Use our status checker to see if there’s a known issue in your area. If there is an issue, you can sign up to our Keep Me Posted service through the status checker, to get updates as we investigate and fix the issue.
If no issues appear, you can rule out a simple device or sim issue by:
1) Turning your phone off and on again to refresh your network connection.
2) Toggling your flight mode on and off.
3) Choosing the O2 network manually in your phone settings.
4) Trying your sim in a different O2 phone – if this works, your phone could be faulty. Use our online troubleshooter to diagnose the problem.
5) Try a different O2 sim in your phone. If it works, your sim could be faulty. Use our online troubleshooter to diagnose the problem.
6) Reset your network settings. This will also reset Wi-Fi networks and passwords, cellular settings, and VPN and APN settings that you have used before.
Make sure to check out our O2 Community pages for more information and support.
If the issue persists, please report the issue using our status checker or via the My Network App so that we can investigate further. You can also sign up to our Keep Me Posted service through the status checker, which will send you updates as we investigate and fix the issue.
- How can I stay connected when I don’t have any signal?
When you have no signal, you can use Wifi to call and message instead.
If it's available with your device, you can use our Wifi Calling service to make and receive calls when you have no signal. We also have over 16,000 O2 Wifi hotspots available to connect to for free, which offer speeds up to 10 times faster than a normal mobile connection.
- 5G explained
The power of 5G on personal and business devices will give everyone a better and more reliable connection in extra busy places, delay-free downloads and buffer-free streaming. But it’s 5G’s impact on the world around us that’s even more exciting. This new technology has the power to connect buildings, transport and services in ways we’ve never seen, completely revolutionising everything from the way traffic flows on our roads, to the way we receive health care.
We now have 5G in parts of most major UK towns and cities, as well as lots of smaller towns and villages. Find out more about O2 5G.
O2 Business customer? Find out how 5G can transform your business.
Take a look at our 5G explained page for FAQs and more information on how to get 5G.
- 2G, 3G, 4G and other jargon
Second generation mobile network known as GSM. Simply put, 2G allows you to send text messages.
The third generation of mobile phone technology, offering better coverage for voice calls and text messaging, as well as providing faster access to the internet.
Also known as HSDPA (High Speed Data Packet Access), 3.5G provides faster data rates than 3G.
The fourth generation of mobile phone technology. With 4G, using the internet on your phone is even quicker, with speeds 5-7 times faster than 3G. If you have a 4G ready phone, but you’re not in a 4G area, you’ll still be able to use 3G. All of our tariffs come with access to both 3G and 4G data.
5G will give everyone a better and more reliable connection in extra busy places, delay-free downloads and buffer-free streaming.
The radio network used to send and receive calls and messages, and use the internet.
You can connect to the internet using wifi, to browse the web, download applications, or send and receive emails, without using your 3G or 4G data.
A fast, free wifi service available to everyone. You just download the app, and you’ll be connected to O2 Wifi whenever you’re in a hotspot.
What is Wifi Calling?
Some phones can use wifi to make voice calls. Wifi Calling (also called Voice over Wifi or VoWifi), helps you make and receive calls even if you can't connect to the mobile network, like when you're on the London Underground. When connected to wifi, you can just dial the number you want to call like normal.
What is 4G Calling?
Some phones support 4G Calling (also called Voice over LTE or VoLTE). 4G Calling lets you make clearer voice calls using our award-winning 4G network. If 4G Calling is available, you can just dial the number you want to call like normal. You can check 4G Calling coverage with our coverage checker.
O2 Pocket Hotspot
A portable gadget that connects you and up to four other people or devices to the internet, when there’s O2 mobile data coverage. The O2 Pocket Hotspot automatically connects to our mobile network as soon as you insert a Pay As You Go sim.
Data reception and speeds may not be as good indoors or in a car. Signal can also be affected by buildings, trees and even weather conditions. This map is just a guide and does not guarantee signal coverage.