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Unfortunately, no network can tell you how strong your signal will be indoors. That's because the signal strength needed to pass through walls and windows varies from building to building.
Issues with your device or account.
Your SIM card, phone settings, a low battery, and running older software can all affect the signal. If your account is on hold, that will also prevent use of the network.
Location.
The closer you are to a mast, the stronger your signal. Signal can also be affected by the lay of the land (hills, valleys, forests etc).
Extreme weather.
Strong winds, flooding or falling trees, for example, can affect our masts.
Temporary structures.
Cranes or scaffolding, for example, can obstruct the signal.
Temporary network outages.
When we're carrying out planned or unplanned maintenance, your signal will probably be affected.
Help with recent loss of signal.
If you normally have signal but you've recently lost it, there could be an outage, or an issue with your device or account. Here's a few things you can try to get your signal up and running again.
Check for outages.
If you haven't already, check the coverage and network status in your area to see if you've been affected by an outage.
Test your device.
Try one or more of these and see if they make a difference.
Turn airplane mode on then off
Turn your device off then on
Ensure mobile data is on
Update your device's software
Reset your network settings *
* This will remove your Wi-Fi passwords
There could there be an issue with your account.
Most likely it's not this, but sometimes a billing issue or a failed top-up can stop you accessing the network.
In the meantime, you can call and text over Wi-Fi.
Some phones have Wi-Fi Calling ready to use, which is compatible with most iPhones and Android phones.
Get in touch.
If you'd like to talk it through, please dial 333 free from a Three phone, or call 03333 381 001 from any other phone.
Help with poor or no signal generally.
We're really sorry if you're having ongoing problems with signal, but here's a few things you can try.
Is the problem always in the same place?
Some locations have a weaker signal, and unfortunately no network can tell you how strong your signal will be indoors. Use our coverage checker to see what the signal strength is like where you are.
Does the problem happen everywhere?
It could be a device issue. Try one or more of these and see if they make a difference.
Turn your device off then on
Update your device's software
Reset your network settings *
* This will remove your Wi-Fi passwords
Could there be an issue with your account?
Most likely it's not this, but sometimes a billing issue or a failed top-up can stop you accessing the network.
