BT Signal Assist

BT Signal Assist
More than 50 in stock
Standard: 1-3 working days
Key features
  • BT Signal Assist is compatible with BT Mobile network only
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Product Description


Having trouble getting the BT Mobile network at home? Here’s how we can help.

  • Please note that BT Signal Assist is compatible with BT Mobile network only

What's BT Signal Assist?

Some people struggle to get a good network signal at home – things like thick walls, basements and certain types of glass can reduce your signal. BT Signal Assist is a device that uses your home broadband connection to give you great reception around the house. It plugs into your home router and creates a link to our mobile network to provide indoor coverage.

It works by providing 3G coverage with a range of about 15 metres, so anyone with access can make a call just as normal.

You'll need a home broadband connection with minimum fixed download speed of 512kbps and an upload speed of 256kbps.

You'll also need:

  • a spare Ethernet port in your home router
  • a spare power supply near your router
  • a 3G compatible phone with a BT Mobile SIM

Using your BT Signal Assist

Once activated, your BT Signal Assist will automatically work. When you're on a call connected through the device, the green light will flash slowly and you'll hear a beep at the start of the call.

Up to four people can connect to your BT Signal Assist at any one time. However, if you have a slower broadband connection this could be limited to one or two people.

As BT Signal Assist uses broadband, it will use some of your home broadband allowance. As a guide – a 20 minute call will use around 9MB. For an average household we predict the Signal Assist will use around 500MB a month, but it depends how many calls you make and texts you send.

When you use BT Signal Assist, we recommend you connect to your home WiFi because it saves on your monthly data allowance and is generally faster.

If you stray out of the range of the Signal Assist while you’re on a call, your call may drop unless there’s a BT Mobile signal available when this happens

You need to have a handset that works with 3G for BT Signal Assist to work. Older 2G handsets cannot use BT Signal Assist.

What do the lights mean?

  • Green light flashing quickly Your BT Signal Assist has lost its connection with us. Try unplugging it and then re-connecting it again, leaving it for a few hours to rectify itself. If the problem persists, call us on 0800 800 150.
  • Red light – single flash BT Signal Assist isn't connected properly. Check the cables are plugged in correctly to your home router and your BT Signal Assist. If this doesn't work, try replacing the ethernet cable and leave it for a couple of hours to reset before giving us a call.
  • Red light – sequence of two flashing lights The BT Signal Assist isn’t receiving an internet connection. Check the connection from your broadband provider.
  • Red light – sequence of three flashing lights Something else is interfering with the signal. Make sure the BT Signal Assist is at least 60cm away from your home router and check it's not too close to other electrical equipment. Changing broadband or moving home

If you change your home broadband supplier, router or move home, then the Signal Assist will stop working and the green light will flash quickly.

You'll need to call us on 0800 800 150 to get it reactivated. This is just a security feature to help us prevent fraud.

BT Signal Assist will be shipped using our Next Day Service, at a cost of £4.99

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BT Signal Assist