iPrimus
iPrimus's mobile plans run on the Optus 5G network, in its own words. Coverage is an Optus SIM's coverage, with no wholesale reduction. Strong in the capitals and the bigger regional centres, thinner off the main highways.
- $500 international call credit on the Large plan, one of the most generous on the market
- Month-to-month, no lock-in contract on any tier
- $5 off if you bundle with an iPrimus internet service
- Real support phone number, 131 789, published on the site
- $5 per 5GB daily roaming add-on
- Only three tiers, all speed-capped at 150Mbps
- Postpaid only, no prepaid option
- No official APN settings published on the support site
- Entry tier at $30 for 30GB is matched or beaten by several rivals on the same network
- The Medium tier's international call credit isn't published, which matters on a plan sold partly on international calling
iPrimus is a Vocus brand, which is worth saying up front because plenty of write-ups file it under TPG. It isn't. Wikidata records Primus Telecommunications (Australia) as a wholly owned Vocus subsidiary, and the site's own footer names Primus Telecommunications Pty Limited as the operating entity.
The mobile range is three postpaid plans on the Optus network. Small, tidy, and pitched at people who are already iPrimus internet customers.
Current plans
Plan | Data | Price | International credit |
|---|---|---|---|
5G Small | 30GB | $30/month | $100 |
5G Medium | 100GB | $45/month | see note below |
5G Large | 150GB | $55/month | $500 |
All three are month-to-month with no lock-in, include unlimited national calls and unlimited SMS and MMS, and are capped at 150Mbps. There's a $5 per 5GB daily roaming add-on, and a $5 monthly discount if you bundle with an iPrimus internet service.
The Medium tier's international credit is the one gap. It sits between the Small plan's $100 and the Large plan's $500, but we couldn't confirm the exact figure from iPrimus's own pages, so we've left it blank rather than guess at it.
Prices confirmed 21 August 2026. Compare these against every other current plan, including the other Optus-network options, in the full comparison table.
Coverage
iPrimus describes its plans as running on the Optus 5G network. That's a full Optus footprint, not a reduced wholesale one, so coverage is the same as an Optus SIM and the same as every other Optus-based brand on the Optus network hub. If you spend serious time in regional Australia, a Telstra-based brand is the more reliable buy whatever the price difference.
APN settings
We don't publish confirmed APN values for iPrimus. Its support site has no APN article that we could find, and we checked support.iprimus.com.au/mobile and its using-your-mobile section directly. Our iPrimus APN page carries what we hold on record and marks it unverified. If a new SIM won't connect, call 131 789 rather than trusting a third-party list.
The honest verdict
The international call credit is the reason to look at iPrimus. $500 on the Large plan is at the generous end of the market, and if you regularly call overseas that credit is worth more than the $5 or $10 a month you'd save going elsewhere.
Take that away and it's an ordinary offer. $30 for 30GB is fine, not sharp: Dodo does 40GB for the same money on the same network. Three tiers is a narrow range, everything is capped at 150Mbps, and there's no prepaid option at all. The bundle discount makes the maths work if you're already an iPrimus internet customer. If you're not, the case for iPrimus rests almost entirely on how much you call overseas.
Frequently Asked Questions
- What network does iPrimus use?
- Optus. Its own mobile page describes the plans as running on the Optus 5G network.
- Is iPrimus part of TPG?
- No, and this one trips people up. iPrimus is a Vocus Group brand. Wikidata records Primus Telecommunications (Australia) as a wholly owned Vocus subsidiary, and iprimus.com.au's own footer copyright names Primus Telecommunications Pty Limited as the operating entity.
- Does iPrimus offer prepaid plans?
- No. All three plans are postpaid, billed monthly, with no lock-in contract.
- How much international calling is included?
- The Small plan carries a $100 international call credit and the Large carries $500. We couldn't independently confirm the figure for the Medium tier, which sits between them, so ask before signing up if international calling is the reason you're looking.