Learn more about how we monitor and fix your network issues. If you are unsure how to change your network mode, follow the below guide for more information. It is simple to use and you can check the network right from your phone. If you are in a low reception area and you are having issues getting a decent signal you may need to revert your Network Mode from 5G/4G/3G/2G to 4G/3G/2G. Sign up to receive updates on any reported network issues.Exceeded data speed limit or speed reduction is reached. And the other mistake I made was buying the phone. I wish I'd known all of this prior to buying a Samsung S21+. They've also talked to Samsung about this. Outdated browser software or browser software requires update. The weak signal receive that is making me need to use WiFi Calling (never had to before with any other phone I used including a Samsung S8+) is ALSO a known problem with the S21 phones. Check the status of our network in your area – you don’t even need to enter your postcode Network congestion or too many users of the network.To verify if this is the case you should try using a different SIM in your phone. Use the My Network app to keep an eye on your coverage, wherever you are. There are instances when the problem can be caused by a faulty SIM card. We also have over 15,000 O2 Wifi hotspots available to connect to for free, which offer speeds up to 10 times faster than a normal mobile connection. If it's available with your device, you can use our Wifi Calling service to make and receive calls when you have no signal. When you have no signal, you can use Wifi to call and message instead. How can I stay connected when I have no signal? 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. Learn more about network congestion, a common network issue you might be experiencing. There are lots of things that may temporarily impact your service including weather, infrastructure, the number of people in your vicinity trying to connect, and whether we are yet to identify a local network issue. If a disruption occurred, removing accessories will allow the phone to receive a signal again. Remove any third-party accessories and cases. Why does the status checker tell me the network is working fine, but I can't connect? Touch the slider to turn off Airplane mode. UI Design Design a beautiful user interface using Android best practices. If you need more help with solving signal issues, visit the O2 Community where our Gurus will be able to offer more advice. Go to Android & Material kits Go to Wear OS kits. If you think there might be an issue with your device or sim: Instructions on how to take these steps can be found using our device-specific trouble-shooter here. Resetting your network settings (this will also reset Wi-Fi networks and passwords, cellular settings, VPN and APN settings that you’ve used before).Choosing the O2 network manually in your settings.Making sure mobile data is turned on in your settings.If there’s no known issue, try manually resetting your device by: Use the O2 network status checker to see if there’s a known network connection problem in your area, or to report an unknown issue to us. From here, you’ll be able to subscribe to updates using Keep Me Posted. What should I do if I’m having signal issues?
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