Using a repeater to improve your indoor mobile phone signal

Published: 15 December 2023

Repeaters are devices that can help people with a poor indoor mobile phone signal get better indoor coverage. They work best when there is a good outdoor signal that can be boosted indoors.

Typically, an indoor repeater device is placed somewhere the outdoor mobile signal can be detected, such as near a window or in an upstairs room. The repeater then boosts the signal inside the building, allowing you to make phone calls, send text messages and use mobile data when indoors.


In May 2022, Ofcom extended the range of static indoor repeaters available for people to buy and install themselves without a licence. We had previously only allowed repeaters that boosted the signal of one mobile phone network at a time.

We now allow repeaters that boost the signal of more than one mobile operator at a time, provided they meet our technical requirements. Repeaters that do not meet those requirements remain illegal.

Choosing the right repeater

We realise it can be difficult to understand the difference between legal repeaters and the range of illegal devices advertised widely online – especially since advertisements for illegal devices often claim they are properly approved. So when choosing a repeater, make sure you purchase it from a reputable retailer.

To help you choose the right repeater, Ofcom has published a list of repeaters that we understand meet the technical requirements of our licence exemption regime. These are not repeaters that we promote or endorse, simply those that have been tested against our requirements by an accredited test house. We will update this list from time to time.

Product name Manufacturer
Hi10-3S-Pro Huaptec
Hi10-4S-Pro Huaptec
Hi10-5S-Pro Huaptec
Nextivity G41-9E Nextivity Inc.
Nextivity Quatra 4000e Nextivity Inc.
Nextivity Connect C41 Nextivity Inc.
Nextivity Quatra Evo Nextivity Inc.
StellaHome Repeater Model: SD-RP1002 StellaDoradus Europe Ltd

If you are unsure whether a repeater is legal to use, you can email us at for advice.

Installing a repeater

Most indoor repeaters are easy to install, but some are more complex, especially if the outdoor mobile signal is very weak and you need an antenna. You might need the help of a professional – someone who knows where to find the nearest mobile phone mast – to install these repeaters.

Other information

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