CEL-FI Booster | ACMA-Approved Mobile Signal Solutions

Why Choose a CEL-FI Booster

CEL-FI is the only legal mobile signal repeater class approved by ACMA in Australia. It is safe for carrier networks, improves call quality and data speeds, and is ideal for small to mid-sized commercial spaces that need fast, compliant indoor coverage.

Improve voice quality and reduce dropped calls
Faster data for cloud apps, POS and collaboration tools
Extend usable coverage area across offices, showrooms and warehouses
Multi-operator capability for Telstra, Optus and Vodafone models
ACMA compliant with professional design and installation

What Is a CEL-FI Booster

A CEL-FI booster is an intelligent mobile repeater that listens to an outdoor mobile signal, cleans and amplifies it, then rebroadcasts it indoors through one or more internal serving antennas. Unlike illegal repeaters, CEL-FI protects the macro cellular network by using carrier-friendly power control and interference management.

How It Works

Donor antenna captures the strongest outdoor 4G or 5G signal on your roof.
CEL-FI smart amplifier increases signal quality and power within carrier limits.
Serving antennas redistribute the improved signal across your floors and rooms.

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How Our 4G and 5G Booster Solutions Work

Leading Mobile Signal Booster Hardware

Our 4G and 5G mobile signal boosters are designed to turn weak or patchy mobile signals into strong, reliable coverage throughout your property. Our solutions combine advanced technology with expert design to ensure seamless connectivity wherever it’s needed.

Our boosters operate through a precision-engineered three-component signal amplification system:

Donor Antenna: Captures the strongest available outdoor signal from nearby mobile towers.
Signal Amplifier: Amplifies the captured signal without compromising clarity, ensuring optimal voice and data performance.
Serving Antenna: Evenly distributes the boosted signal indoors, eliminating dead zones and coverage gaps.

4G and 5G signal booster performance relies on meticulous technical design. Proper isolation between donor and serving antennas prevents interference, while our RF specialists determine exact placement during a comprehensive site assessment. With multi-operator support, all users can enjoy reliable coverage across the same building.

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When a CEL-FI Booster Is the Right Choice

Small to medium offices, clinics and retail stores with patchy indoor coverage
Warehouses and light industrial sites needing reliable calling and data
Regional premises with a usable outdoor signal that does not penetrate indoors
Tenancies awaiting a long-lead DAS project and needing an interim fix
Car parks and lower levels where staff safety and public safety communications matter

If your site is very large, has many levels, or must support thousands of users, a Distributed Antenna System (DAS) may be more suitable. MobileCorp designs CEL-FI and DAS solutions and will recommend the best fit during assessment.

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Why MobileCorp

Australian in-building coverage specialist with certified installers
Telstra partner delivering enterprise-grade solutions nationwide
End-to-end service including assessment, design, installation and support
Clear documentation, coverage heatmaps and commissioning reports
Ongoing optimisation as networks and tenancy layouts change

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1. Site Assessment

RF engineers measure outdoor signal strength, confirm carrier bands in use and map indoor problem areas. Building materials, floor layouts and cabling routes are reviewed to design the coverage footprint.

2. Solution Design

We select the right CEL-FI model for your carrier and band plan, size the number of serving antennas and plan cabling, power and mounting. You receive a simple proposal with expected improvements and timelines.

3. Professional Installation

Certified technicians mount the donor antenna, run cabling, install the CEL-FI unit and serving antennas, then commission the system. Isolation and performance checks prevent oscillation and ensure stable operation.

4. Verification and Handover

We validate call quality, data throughput and signal levels across your key areas, then provide coverage maps and compliance documentation. Support options are available for monitoring and tune-ups.

What are the benefits of using Cradlepoint and Starlink?

Achieve reliable connectivity by combining Cradlepoint’s 5G edge routing with Starlink’s high-speed satellite internet. As a leading Cradlepoint partner and Telstra 5G specialist, MobileCorp has delivered some of Australia’s earliest and most dependable wireless networks. This dual connection setup provides both primary and backup internet, helping your business stay online and productive—even in remote or challenging locations.

CEL-FI for Key Industries

Corporate offices and high-rise tenancies – keep teams connected in meeting rooms, lifts and end-of-trip areas.
Warehousing and logistics – improve scanner reliability, WMS access, and driver comms on the floor.
Healthcare and aged care – support staff mobility, patient contact and visitor communications.
Retail and hospitality – enable mobile POS, staff apps and guest experience in store.
Education and campuses – provide dependable indoor coverage for staff and students across blocks.
Underground car parks and basements – enhance staff safety and public safety communications in lower levels.

Are CEL-FI boosters legal in Australia?

Yes. CEL-FI is the only carrier-approved mobile repeater class authorised by the ACMA. These devices meet strict technical standards to protect Australian networks. MobileCorp supplies genuine CEL-FI hardware with certified installation, ensuring legal and reliable cellular coverage across your site.

Will a CEL-FI booster work at my site?

A CEL-FI booster requires a detectable outdoor signal from your service provider. During our site assessment, we measure signal levels and determine the best placement for antennas to maximise signal gain and indoor cellular connectivity.

Can one system support multiple carriers?

Each CEL-FI model is carrier-approved for a specific network, such as Telstra, Optus or Vodafone. Multi-operator cellular coverage can be achieved by combining the correct mix of units and antenna design within the same property.

How much area can a CEL-FI booster cover?

Coverage depends on outdoor signal strength, building materials and design. A professionally engineered system using multiple serving antennas can improve cellular connectivity across hundreds to thousands of square metres.

Does CEL-FI support 5G?

Yes. CEL-FI supports selected 5G and 4G bands depending on your service provider and location. Our engineers check the active band plan in your area to ensure your installation supports both current and future connectivity needs.

How long does installation take?

Most commercial installations are completed in one day once access is arranged. Larger or more complex buildings may take longer. MobileCorp’s certified technicians deliver professional, Australia-wide service with minimal disruption to your operations.

What if my building needs more than a booster?

If your property has complex layouts or high traffic, MobileCorp can design a Distributed Antenna System (DAS) to complement your CEL-FI setup. This ensures scalable cellular coverage and performance consistency across every level of your facility.

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Get Started with Reliable Indoor Coverage

Don’t settle for a poor signal or unreliable connections. With an ACMA-approved CEL-FI booster, your business can enjoy strong, consistent cellular coverage across every level of your building. MobileCorp’s certified engineers design and install carrier-approved systems Australia-wide, backed by ongoing support that keeps you connected as networks advance.

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CEL-FI Booster: Legal, Reliable Indoor Mobile Coverage for Australian Businesses