The short version
Business 5G is a real option for a main connection, not only a backup. A small office, shop or depot with strong signal, modest uploads and no need for inbound access can run on it well, and it can be live in days rather than the weeks or months a fixed build can take.
It is the wrong main connection when signal is marginal at the busiest hour, when the business uploads heavily, when something outside needs to reach the site on a fixed address, or when an outage would stop trading and there is no second service.
Our recommendation for a permanent site: if a decent fixed service is available, use it as the primary and put 5G behind it as the backup. Use 5G as the primary where fixed options are poor, slow to arrive or expensive to build, or where the site is temporary.
When does business 5G work as the main connection?
5G works well as the primary service when most of these are true:
- Indoor signal (or signal at an external antenna) is strong, and stays strong at the busiest time of day
- The team is small to medium and mostly downloads: email, SaaS, browsing, cloud apps
- Calls and video meetings run, but not dozens at once
- Nobody needs to reach a server, camera recorder or VPN at the site from outside
- The fixed alternatives are slow to arrive, need an expensive build, or the lease is short
It struggles when:
- The site is below ground, deep inside a large building or under heavy steel cladding with no antenna option
- The business uploads a lot: video production, large CAD or imaging files, offsite backups during the day, many concurrent calls
- The site sits in a busy area where the local cell is congested at peak times
- Something needs a static public IP
- There is no backup, and a dead connection means no trade
How do business 5G speeds compare to fibre?
Raw download speed is where 5G looks best. At the time of writing (October 2026), Telstra publishes typical business-hours download ranges for its 5G Business Internet plans from about 21 to 23 Mbps on the entry plan up to 83 to 640 Mbps on its top plan. Optus publishes typical busy-hour figures on its business 5G page of 50 Mbps on its entry plan and around 230 Mbps on its uncapped plan. Those ranges are wide for a reason: they depend on the address.
The differences that matter for a business are elsewhere:
| Business 5G | Business NBN fibre | Enterprise Ethernet or dedicated fibre | |
|---|---|---|---|
| Download | Good to excellent, varies by site and time | Set by the plan tier | Set by the bandwidth you buy |
| Upload | Usually a fraction of download, varies | Lower than download on most plans | Symmetrical |
| Consistency through the day | Varies with cell load | Generally steady | Steady, with service levels |
| Latency | Usually fine for calls and video, more variable | Low and steady | Low and steady |
| Static IP | Rarely available | Often available | Usually included |
| Install time | Days | Days to weeks at a serviced address | Weeks to months, sometimes a build |
| Moves with the business | Sometimes, depends on the plan | No | No |
Upload deserves its own line. Telstra’s published business-hours upload for its top 5G business plan runs from 5 to 96 Mbps, a far wider spread than download. Every call, video meeting, file save to the cloud and remote camera view uses upload, so it is usually the first thing a 5G office notices. How many staff can work off one business 5G connection shows how to size it.
NBN vs 5G: what is the actual difference?
The NBN is a fixed network. At most business addresses it arrives over fibre or copper, and in some regional areas over nbn fixed wireless, which uses dedicated towers rather than the mobile network. Your provider buys wholesale access and sells you a plan.
Business 5G uses a mobile carrier’s own network. The router contains a SIM, talks to the nearest 5G cell, and shares that cell’s capacity with phones and other 5G internet users nearby. That shared capacity is why carriers limit how many 5G internet services they connect in an area. Telstra says plainly that it only connects “a limited number of premises” to 5G Business Internet in each area, so availability can change month to month.
The practical consequence: the NBN is the more consistent primary, and 5G fails for different reasons, which is exactly what you want from a backup.
Check coverage properly before you sign
A coverage checker tells you what the carrier’s model predicts outdoors. It does not know about your concrete walls, low-E glazing or steel roof.
If the checker says “good” rather than “excellent”, treat it as a reason to test, not a reason to walk away:
- Test where the router will sit, not at the front door. Use a 5G router or a test device on each carrier you are considering.
- Test at the busiest time of day, on more than one day. A 7am result says little about 11am.
- Record signal quality, not only speed. Signal strength and signal quality readings tell you whether the speed is likely to hold.
- Test at the antenna position if indoor results are marginal: a roof, a high wall or a window facing the tower.
An external antenna on a short, good-quality cable often turns a marginal indoor signal into a dependable one. It needs a mounting point, a cable route into the comms cabinet and, in a managed building or shopping centre, approval. Check whether the plan’s supplied modem accepts an external antenna. Many consumer-style modems do not, which is one reason to use your own business router.
Data caps, plan types and business vs consumer 5G
Read three things in any 5G plan before you sign.
Speed caps. Several plans cap speed at a fixed figure, such as 50 or 100 Mbps, and only the top tier is uncapped. Check which you are buying.
Data policy. Telstra’s 5G Business Internet plans include 1000 GB a month and slow down after that. Optus advertises unlimited data on its business 5G plans. A busy office with cloud backups can use a lot more than you expect.
Business use and priority. Some consumer 5G plans are for personal use only. Vodafone’s 5G home plans, for example, are for “personal use at an approved service address”. Some consumer plans also say their traffic gets lower priority when the network is busy. A business plan costs a little more, and in return the terms allow business use and you get business support.
Also check the hardware terms. Optus links its 5G modem to a 36-month term, and Telstra notes its modem only works at the business address where it was first set up. That matters if you might move.
Which providers offer business 5G in Australia?
We are not going to rank them, because the best one is the one with the strongest signal at your address. At the time of writing (October 2026), the business 5G options we see most often are:
- Telstra 5G Business Internet, on Telstra’s network, in three speed tiers with a data allowance and no lock-in contract.
- Optus business 5G, on Optus’s network, in capped and uncapped tiers with unlimited data and no static IP.
- Resellers on the Optus network, such as SpinTel’s 5G business plans. Aussie Broadband sells business mobile broadband on the Optus network as data-only SIMs.
- Telstra Dynamic 5G, an enterprise fixed-wireless product on Telstra’s 5G standalone network with a committed throughput, installed by Telstra and only available in some areas.
TPG and Vodafone sell 5G home internet, but we did not find a business 5G fixed-internet product on their business sites at the time of writing.
For high upload, compare the published upload figures for each plan, then test at the site. A carrier with better signal at your address will usually give more upload than a faster-sounding plan on a weaker network.
Which business 5G plans come with a static IP?
Most do not. Optus states its 5G business service does not support a static IP address. Vodafone says its 5G home service uses carrier-grade NAT, which shares one public address among many customers and stops port forwarding and remote access. We did not find a mainstream business 5G plan that lists a static IP option.
You need a static IP if something outside has to start a connection to the site: a remote-access server, a camera recorder viewed from outside, a site-to-site VPN that expects a fixed address, or a supplier that whitelists your IP. Workarounds:
- Use a cloud-managed router or camera system that connects outward to its cloud, so no inbound access is needed
- Run the VPN from the site outwards to a head office or a cloud VPN gateway
- Choose a fixed service with a static IP as the primary, and use 5G as the backup
Is business 5G more exposed than a fixed line?
Not by itself. The radio link between the router and the tower is encrypted, and a 5G service behind carrier address sharing, which is common on mobile networks but not universal, cannot receive unsolicited connections from the internet at all, which is a security benefit.
The risks are the usual ones, and they are about the router, not the radio:
- A consumer modem with default passwords and its admin page reachable from outside
- A flat network where card terminals, staff laptops and guest Wi-Fi share one segment
- No firewall rules, logging or firmware updates
PCI DSS, the card industry security standard, treats cellular networks as untrusted, the same as the internet, and expects a firewall between them and the card environment. Put a business firewall in front of the network, keep payment systems on their own segment, and treat the 5G link the same way you would a fixed line.
Is 5G viable as the main connection for a small retail store’s POS?
POS and EFTPOS use little bandwidth, so a modest 5G signal carries them. The risk is not speed but the day the signal drops on a busy Saturday. For a temporary or pop-up store, 5G as the main connection is often the right answer. For a permanent store, we prefer a fixed service with 5G failover. The retail store fit-out technology checklist covers the rest of a store’s setup.
Our regional depot has poor fixed internet. Would 5G be an upgrade?
Often, yes. A depot on an old copper service or a congested fixed wireless tower can see a big improvement from 5G, if the site has strong signal from at least one carrier at a point where an antenna can go. Compare it fairly against nbn fixed wireless, which nbn has upgraded across much of its footprint, with wholesale tiers up to 400 Mbps download where available.
If 5G wins, keep the old service and make it the backup. Two different services at a regional site are worth more than one fast one. Internet for regional and remote Victorian sites covers the wider set of options, including Starlink.
Get the site tested before you commit
Kookaburra Comms is carrier-neutral and does not sell SIMs. We test signal on each network at your premises, recommend the plan that suits the site, then design and install the business router, external antenna, failover to a second service and the monitoring that tells you when something drops. Start with business internet and send us the address, headcount and what the site runs.