Mobile Coverage Solutions for Australian Businesses
If your team can’t get reliable calls, texts or data inside a building or across a work site, the fix usually falls into one of three categories: a carrier-approved signal booster (Cel-Fi), a distributed antenna system (DAS) for larger or more complex sites, or a vehicle-based booster for teams working on the move. Which one fits depends on the size of the space, the construction materials, how many people need coverage, and whether the issue is one building or an entire site.
Younifi designs and installs all three, backed by a proper site audit rather than a guess.
Why mobile signal fails inside buildings and across sites
Mobile signal is line-of-sight technology at heart. It struggles to get through steel cladding, low-E glass, concrete and basement levels, and it weakens further the more floors or internal walls it has to pass through. On larger sites — mine camps, agricultural properties, transport depots — the issue is often distance and terrain rather than building materials, but the result is the same: black spots where staff can’t be reached and data won’t load.
This matters more than it used to. Two-factor authentication, safety check-ins, EFTPOS, and cloud-based systems all assume a mobile connection is available. When it isn’t, the cost shows up as lost productivity, safety risk, or lost trade.
WHO THIS AFFECTS
Poor mobile coverage is a recurring issue for warehouses and industrial buildings, hospitals and health clinics, schools and education campuses, mining camps and remote sites, transport depots and logistics operations, local government buildings, and multi-storey commercial buildings with basement or core areas that sit outside normal signal range.
COMPARING THE OPTIONS
Indoor coverage boosting (Cel-Fi G41 & G51) The right starting point for a single building or a defined problem area — a warehouse floor, a clinic, an office core. It’s carrier-approved for Telstra, Optus and Vodafone, supports 4G and 5G, and can be deployed without the delays of a full carrier application. See Indoor Coverage Boosting →
Distributed Antenna Systems (Cel-Fi Quattra & DAS) Scale further — multiple zones, multiple floors, or buildings where one booster and antenna isn’t enough. This is the usual fit for hospitals, stadiums, high-rise commercial buildings and government or defence facilities, and it starts with an RF site survey to map exactly where coverage is failing before anything is installed. See Distributed Antenna Systems →
Vehicle coverage kits (Roam R41) Solve a different problem: coverage that travels with a fleet or field team rather than a fixed building. Common on mining and exploration fleets, agricultural vehicles, and emergency and government vehicles working outside normal range. See Vehicle Coverage Kits →
How Younifi audits and designs a coverage solution
Every project starts with a site assessment rather than a standard package. That typically means:
- An RF site survey to identify where signal actually drops and why
- A review of which carriers your team needs supported
- A design that matches the fix to the problem (rather than over- or under-specifying equipment)
- Carrier-approved installation and commissioning
- Remote monitoring after handover so issues get caught before they’re reported
What drives cost and timeframes
Cost is driven mainly by the size and complexity of the space (number of zones, floors and materials), which carriers need to be supported, and whether the site needs a single booster or a full DAS. A single-zone Cel-Fi install is typically the fastest and lowest-cost option; multi-zone DAS projects take longer because of the site survey and design work involved, but suit large or high-occupancy buildings where a single booster won’t reach. Younifi can give an indicative cost range once a site survey has been done — trying to price this without one usually leads to the wrong-sized system.
Common mistakes and risks
The most common mistake is installing an uncertified or non-carrier-approved booster. These can be switched off remotely by the carrier if they interfere with the network, and in some cases contravene ACMA rules — leaving a business with equipment it can’t legally run. The second most common mistake is undersizing the system for the space, which means the black spot moves rather than disappears. A proper site audit avoids both.
Related services
If the coverage issue is part of a broader connectivity gap — no fixed internet on site, or a need for a permanent tower — see Communications Infrastructure Builds and Networking & Security.
frequently asked questions (faq's)
Do I need carrier approval to install a mobile coverage booster? Yes. Cel-Fi systems are designed to work within carrier rules and are approved for use on Telstra, Optus and Vodafone networks. Non-approved boosters can be shut down remotely and may breach ACMA regulations.
What’s the difference between Cel-Fi and a distributed antenna system (DAS)? Cel-Fi is a booster and antenna system suited to a single building or defined area. A DAS distributes signal across multiple zones or floors using a network of antennas, and is the usual choice for larger or more complex sites like hospitals and high-rise buildings.
How much does indoor mobile coverage cost? It depends on the size of the space, how many carriers need to be supported, and whether a single booster or a full DAS is required. Younifi provides an indicative cost range after a site survey, since pricing before that point is usually inaccurate in either direction.
Can mobile coverage be fixed without a site visit? Not reliably. A site survey identifies exactly where signal drops and why, which is what prevents over- or under-sized systems. Remote estimates are a starting point for a conversation, not a final design.
Does this work for vehicles as well as buildings? Yes — vehicle coverage kits solve a different problem to fixed boosters and are built for mining, agricultural and field-based teams working outside normal signal range. See Vehicle Coverage Kits → for detail.
Younifi’s coverage solutions in action
The Bunbury Farmers Market recently opened their new site in Vasse to coincide with the opening of the new Bunbury bypass roadway. The site was so large that coverage didn’t quite stretch across the whole location. We were able to provide a commercial-scale indoor coverage solution that solved this issue and improved coverage across the premises.
From concept and design to construction and commissioning, we worked side by side with Bunbury Farmers staff to create a bespoke solution that serves their needs. Thanks to our work, signal strength went from 1 bar and unable to make calls, to consistent 4 bars and high-speed data across the site.