Field note · Australia
Poor Mobile Signal at Your Office or Small Business in Australia? What You Can Legally Do
Dropped calls at the shop, clinic or office? Why business premises lose Telstra, Optus and Vodafone signal, the free fixes, and the ACMA rules on boosters and repeaters.
Short answer
Offices, shops and clinics lose mobile signal through concrete, steel, tinted or coated glass and basements. Start with Wi-Fi calling and your carrier's business coverage options. In Australia, ACMA says mobile phone boosters are prohibited, and a repeater may only be used with the written authorisation of the carrier whose network it repeats, so get that permission before installing any hardware.
Why business premises have poor mobile signal
Commercial buildings are hard on mobile signal. Reinforced concrete, steel frames, metal roofing and insulated panels absorb or reflect radio waves, and many shopfronts and office towers use tinted or low-emissivity glass with a metallic coating. Ground-floor shops in busy strips can also sit in the shadow of taller buildings, and anything below street level, such as a basement clinic, storeroom or car park office, can lose signal completely.
For a business this is more than an annoyance. Missed calls are missed customers, card terminals on mobile data can fail at the counter, and staff who rely on phones for two-factor sign-in lose time every day.
Step 1: map the problem
Walk the premises with Wi-Fi switched off and note where calls drop and data slows, then test outside at the front, the back and, if you can, on the roof. Check which network each phone is on: Telstra, Optus or Vodafone (TPG Telecom), or a brand using one of them, such as Boost Mobile on Telstra, amaysim on Optus or Felix on Vodafone. If only one network is poor, the fix may be as simple as moving key phones to a stronger network.
Step 2: the quick, legal fixes
Wi-Fi calling is the fastest free fix. All three major networks support it on most current phones, so calls and texts travel over your NBN connection instead. Make sure the Wi-Fi covers the whole premises, using mesh access points if needed, and that the router prioritises voice traffic.
For card terminals and point-of-sale devices, use the wired or Wi-Fi connection where the device supports it rather than mobile data. And talk to your carrier's business team: they can assess coverage at your address and may offer carrier-supplied in-building solutions or authorised equipment for larger sites.
What ACMA says about boosters and repeaters
ACMA is clear that mobile phone boosters are prohibited in Australia, and that it is an offence to supply or operate one. A mobile phone repeater may be used only with the written permission of the carrier whose network it is used on, because the carriers hold the licences for those frequencies. ACMA publishes a list of repeaters that are exempt when carrier-authorised. Unauthorised devices can interfere with the network and attract penalties.
So the honest order is: free fixes first, then your carrier. If your carrier authorises a repeater for your premises, we can talk you through sizing and installation options, but please get that authorisation in writing before you buy or install anything. We don't claim any product in our shop is approved for use in Australia.
Sizing coverage once you have carrier permission
If a repeater is authorised, size it to the floor area and layout. A single shop or small office of up to about 300 m² is the smallest class of kit; a medical suite or open-plan office floor usually needs 500 to 1,000 m² class coverage, and more indoor antennas where walls divide the space. The outdoor antenna needs a usable signal, so test on the roof first. Our product pages list the bands each kit covers; your carrier can confirm which bands it uses at your address. Prices in our Australian shop are shown in AUD.
A checklist before you spend money
Test signal room by room and outside. Turn on Wi-Fi calling on every work phone. Move card terminals to Wi-Fi or Ethernet. Call your carrier's business team about coverage at your address. Get written authorisation before any repeater is installed. If you lease, get the landlord's consent for any roof antenna or cabling. Keep the paperwork with your lease and insurance records.
Frequently asked questions
Can I buy a mobile signal booster for my shop in Australia?
ACMA says mobile phone boosters are prohibited in Australia. A repeater can only be used with the written authorisation of the carrier whose network it repeats, so speak to your carrier first.
What is the fastest fix for bad signal at my office?
Wi-Fi calling. Telstra, Optus and Vodafone support it on most current phones, and it works wherever your Wi-Fi reaches.
Will Telstra or Optus help with signal inside my building?
Business teams can assess coverage at your address and may offer in-building options or authorise equipment for larger sites. Ask them directly.
Why is signal worse inside than on the street?
Concrete, steel framing, metal roofs and coated glass block mobile signal, and nearby buildings can shadow lower floors.