Nextivity CEL-FI GO G41-9E Signal Booster Bundle - Patchy Internal Signal
Nextivity CEL-FI GO G41-9E Signal Booster Bundle - Patchy Internal Signal

Nextivity CEL-FI GO G41-9E Signal Booster Bundle - Patchy Internal Signal

EE
£1,371.99
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Nextivity CEL-FI GO G41-9E Signal Booster Bundle - Patchy Internal Signal
  • Nextivity CEL-FI GO G41-9E Signal Booster Bundle - Patchy Internal Signal
  • Nextivity CEL-FI GO G41-9E Signal Booster Bundle - Patchy Internal Signal
  • Nextivity CEL-FI GO G41-9E Signal Booster Bundle - Patchy Internal Signal
  • Nextivity CEL-FI GO G41-9E Signal Booster Bundle - Patchy Internal Signal
  • Nextivity CEL-FI GO G41-9E Signal Booster Bundle - Patchy Internal Signal
Nextivity CEL-FI GO G41-9E Signal Booster Bundle - Patchy Internal Signal
NetworkEE
£1,371.99
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Shipping

Orders received by 14:00 (2pm) are dispatched the same day. We offer free standard delivery to mainland UK and most addresses should receive their orders the next business day.

For our full shipping policy please see our Delivery page.
What It Does for You

Clearer indoor calls, faster mobile data, and better coverage around the home.

Networks It Works With (and Can I Switch?)

Works with all major UK networks: EE, O2, Vodafone and Three, plus most providers that use those networks (for example Tesco Mobile). You can find a full list here.

You choose which network to boost in the WAVE app. Switching takes around 30 seconds, but the booster can only boost one network at a time.

Is This Model Right for My Home?

This model is ideal if you already get a decent signal in parts of the building but have dead spots elsewhere.

If you have little or no signal indoors, but you can find some signal outside (or in one spot such as an upstairs window), the CEL-FI GO G41-9E with external antenna is usually the better fit.

Easy Installation

You can set it up in five simple steps.

  1. Install the CEL-FI Whip Antenna
  2. Install the CEL-FI Patch Antenna
  3. Mount the CEL-FI GO G41 unit near a power outlet
  4. Connect the antennas to the unit
  5. Finally plug in the CEL-FI GO G41 and optimise using the WAVE app

Tip: we recommend a “soft install” first (no drilling) to confirm you’re happy with the performance before making anything permanent. The quick start guide can be downloaded here.

Self Install Doesn't Mean Self Support

If you need a hand, you’re not on your own. We’ll check in a few days after delivery to make sure you’re all set, and we can talk you through setup if needed.

You can also use our FAQs and Quick Start Guide, or contact our team for support at any time.

Ofcom Legally Compliant

CEL-FI boosters meet Ofcom’s licence-exempt requirements (IR2102) and are legal to use in the UK.

They’re also licence-exempt under ComReg requirements for Ireland. SAR levels are comparable to a smartphone when used as intended.

Future Proof - Your Investment is Protected

If you switch mobile provider in future, you don’t need a new booster. You can simply change the boosted network in the WAVE app in seconds.

What’s in the Box
Not Sure Which Booster to Choose?

Use our short questionnaire and we’ll point you to the right option for your home.

Find the Right Solution for You

Key Features

Easy Self Install

Set up in 5 simple steps (no technical skills needed)

Control in the App

Set up, optimise and switch networks in the WAVE app

Powerful Signal Boost

Stronger indoor signal for clearer calls and faster data

Better Coverage Around the Home

Improves signal across multiple rooms

Ofcom Compliant & Network Safe

Legal to use in the UK and safe for mobile networks

4G/5G Ready

Ready for today’s networks - and what’s next

Nextivity CEL-FI GO G41-9E 4G/5G mobile signal booster for home

If calls drop out indoors, you’re stuck on one bar, or 4G/5G data is unreliable at home, the Nextivity CEL-FI GO G41-9E is a premium, carrier-grade mobile phone signal booster (a 4G signal booster that’s also 5G-ready) built to improve mobile signal indoors. It captures the strongest available signal from outside, boosts it, and brings it back inside for clearer calls, more reliable data and better coverage around the home.

It’s especially effective in rural areas, larger homes and home offices where indoor mobile reception is the main problem.

Unlike many cheap “signal repeaters” sold online, CEL-FI boosters are Ofcom compliant and licence-exempt under IR2102, making them legal to use in the UK: ideal if you’re looking for a signal booster UK solution that’s compliant and network safe. They’re also engineered to be network safe, so they won’t interfere with mobile networks or your other wireless devices.

Who this booster is best for This model is ideal if you get a decent signal in some rooms but have dead spots elsewhere. It’s a strong choice for larger homes, rural properties, home offices and small buildings where indoor mobile reception is the problem.

If you have little or no signal indoors, but you can find some usable signal outside (or in one reliable spot such as an upstairs window), the CEL-FI GO G41-9E with external antennas is usually a better fit than smaller, single-room solutions.

How it works CEL-FI GO G41 uses a donor antenna to collect mobile signal from outside. That signal is fed into the booster unit, which amplifies it and sends it to a server antenna to improve reception in other areas inside the building.

The system needs to detect a minimum level of signal to operate, so it’s worth checking you can pick up at least some mobile signal where you plan to install the system before permanently fixing anything in place.

Which networks it works with (and can I switch?) The CEL-FI GO G41 range supports all major UK networks: EE, O2, Vodafone and Three. It also supports most providers that run on those networks (MVNOs) such as Tesco Mobile, giffgaff and Sky Mobile.

The booster can only boost one network at a time, but you can switch between networks using the CEL-FI WAVE app. Changing the configured network typically takes around 30 seconds, which helps protect your investment if you change provider in future.

What’s included Additional compatible antennas are available if you need to adjust your installation or extend coverage. Key features
  • Premium, carrier-grade performance with up to 100 dB maximum signal gain
  • Improves voice and mobile data for 4G and 5G-ready use (subject to local coverage)
  • Works with EE / O2 / Vodafone / Three and most UK MVNOs
  • Switch networks using the CEL-FI WAVE app (one network boosted at a time)
  • Designed to coexist peacefully with Wi-Fi and other indoor wireless equipment
  • Licence-exempt and compliant with Ofcom IR2102 (UK) and ComReg requirements (Ireland)
  • Coverage can be up to 1,500 m² per unit depending on layout, construction materials and antenna placement
Installation overview (5 steps) You can install the system yourself, or we can arrange professional installation if you’d prefer.
  1. Fit the whip antenna to the unit
  2. Fit the patch antenna where the signal is to be boosted
  3. Mount the booster unit near a power socket
  4. Connect the patch antenna to the unit (8m cable included)
  5. Power on and optimise using the CEL-FI WAVE app
Tip: we recommend a “soft install” first (no drilling) to confirm performance before making anything permanent.

If you want extra peace of mind, our team can talk you through setup: we’ll check in a few days after delivery to make sure you’re up and running.

CEL-FI WAVE app (iPhone and Android) The CEL-FI WAVE app is used to activate, set up and optimise your booster. It also allows you to switch the configured network, monitor status and apply updates. The app is available for iOS (iPhone) and Android, with desktop options for PC and Mac. Technical highlights (for those who want the detail)
  • Supports multiple channels with bandwidths from 5 to 20 MHz
  • Total system relay bandwidth up to 40 MHz
  • Supports two bands simultaneously from a single operator
  • Automatic gain control and real-time echo cancellation to maintain stable performance in changing RF environments
  • Peaceful coexistence with Wi-Fi (2.4 GHz and 5 GHz), femtocells and mobile devices
  • Booster dimensions: 26.7 x 5.6 x 10.7 cm
Legal, network safe, and built for real homes Many cheap “signal boosters” and mobile signal repeaters sold online aren’t legally compliant in the UK and can cause interference. CEL-FI is different: it’s Ofcom licence-exempt (IR2102) and engineered to be network safe, so you get a proper, compliant solution. Compatibility summary Works with EE, O2, Vodafone and Three, plus most UK MVNOs. One network can be boosted at a time, and the WAVE app is used to switch between networks.