• Solve all Signal Issues with Cel-Fi

    The most advanced technology for boosting 3G & 4G mobile coverage

    Watch the VideoShop Now
    Authorised Reseller
    Cel-Fi is Licence Exempt in the UK and fully complies with Ofcom SI 2018/399

3G / 4G / LTE Mobile Phone Signal Boosters

Do you struggle to maintain a mobile phone signal in your home or office? Does your mobile phone line break up during an important phone call?

Finally, there is a solution for poor signal strength at home and the office. Cel-Fi’s mobile phone signal booster strengthens your signal indoors by up to four times, providing clear voice conversations and greater data throughput- there’s no need to restrict your mobile conversations to outside. Available in the PRIME for small homes, the GO M for vehicles, the GO X for small to medium enterprises and the QUATRA for medium to large enterprises Cel-Fi UK offers legal mobile phone signal boosters for 3G, 4G and LTE voice and data for all UK mobile networks: O2, Vodafone, Three and EE (and all virtual network operators, e.g. BT, Giffgaff, Virgin Mobile, Sky Mobile etc.). Designed and produced by Nextivity.

Ready for Cel-Fi? Choose your network:

See all Supported Networks

Users of Cel-Fi





How it works

  • The fully wireless system works by placing the Network Unit in an area of the building with the strongest signal (normally on a window sill).
  • It takes this signal, as little as 1 bar, and amplifies it to up to 5 bars.
  • The Coverage Unit is then placed in an area of the building with poor reception and works to create a bubble of stronger signal distributed across approximately 13,000 sq ft.
  • The system works wirelessly with all phones that operate with 3G or 4G signal – there is no need for an internet connection or to pair your device with the Cel-Fi unit.
Read MoreWatch the Video

Strengthen Indoor Signal

Cel-Fi is designed to improve indoor mobile phone signal for 3G and 4G users. It creates a large coverage bubble of improved signal that automatically adjusts to the size of the building – making it ideal for homes and Small-to-Medium businesses.

Reduce Dropped Calls

With increased connectivity to your 3G and 4G data, you can ensure improved voice clarity, reduced dropped calls and faster data transfer rates when downloading videos, photos, emails and data to your smartphone.