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Three reasons why you should put a secondary prepaid SIM in your phone

Posted by Zachariah Kelly, 7 August 2026

Image credit: Adobe Stock

Have you ever considered adding a secondary prepaid SIM to your phone? While a single phone SIM from us at Optus could offer a convenient amount of data and a range of inclusions that could set you up well for your day-to-day activities, a secondary prepaid phone SIM could offer you additional flexibility, allowing you to use both your work and personal phone numbers on a single device, or stay connected when travelling overseas without the need to hot swap your SIM cards.

That’s what we’re talking about in this article – secondary prepaid SIMs and what benefit they may offer when you slot them into your compatible phone.

Keep in mind that your phone will need to be compatible with the Optus network – you can learn more about compatibility here. Your phone will also need to either have dual SIM support, support both a physical SIM and eSIM concurrently, or support multiple eSIMS. Your phone may only offer one SIM slot and eSIM, or your phone may offer multiple SIM slots while also offering eSIM. Just look into if your phone supports multiple SIMs before buying a secondary prepaid SIM.

Let’s chat secondary prepaid SIMs.

Why should I get a secondary prepaid SIM?

A secondary prepaid SIM might be worthwhile if you’re looking for additional flexibility – say, for example, if you’d like a separate phone number for personal and work calls on one device, if you’d like a dedicated SIM for travelling, or if you’d like your secondary SIM to connect to a different network. A secondary SIM will come at an additional cost, but you may find it to be worth it for the perks on offer. Let’s chat three reasons why you should consider a secondary prepaid SIM.

Work-life balance

A key benefit of having a secondary SIM activated is the ability to have two phone numbers on a single phone. This could be a worthwhile perk to consider if you want to split up the calls you get through work and the calls you get through your personal life.
Being able to use separate SIMs with different phone numbers, while still receiving calls on both concurrently rather than having to carry around two separate mobile phones, is a pretty good plus in favour of splitting up your personal and work activities across two SIMs.

Shop Optus prepaid SIMs

A SIM for travelling

Are you a keen traveller, or are you looking to go overseas for the first time? However new to travel you may be, it’s a good idea to pick up a secondary SIM to put your mind at ease when heading away from home. A secondary SIM means you can take advantage of local plans while travelling overseas and still stay connected to your Australian number.
A secondary SIM with perks and benefits geared towards travel, such as call, text and data benefits within other countries, may be worth your while, especially if you don’t want to rack up a large bill on your primary plan.

Two networks on one phone

Shop Optus prepaid SIMs

Concerned about network coverage where you might be going? You may want to consider picking up a SIM card on a different network, to increase your odds of getting a good connection. This might be something to consider if you’re headed into regional Australia and you’re not sure what the network situation is going to be like.

Our award-winning network covers a massive footprint of Australia, which you can learn more about here.

Shop Optus prepaid SIMs

The bottom line: should I get a secondary prepaid SIM?

Picking up a secondary prepaid SIM from Optus might be the right play for a bunch of reasons – you need two numbers on a single phone, you’d like a second SIM for when you go travelling overseas, or if you’d like a second SIM to connect to a second network, just in case there’s a coverage drop out.

Overall, it’s all about enabling better choice and flexibility for yourself. Your main phone plan might be great, but your secondary prepaid SIM might go further when you need it.

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Disclaimer: 

The commentary and review, views and opinions expressed on Well Connected are those of the authors. They do not necessarily reflect the official position of Optus. Any prices of advertised products and services are correct as at the date of publication.

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 Content found on Well Connected may contain links to other Web Sites (“Linked Sites”). The Linked Sites are not under our control we are not responsible for the content of any Linked Site, including without limitation any link contained in a Linked Site, or any changes or updates to a Linked Site. We are not responsible for webcasting or any other form of transmission received from any Linked Site. We are providing these links to you only as a convenience, as part of our commentary and review, and the inclusion of any link does not imply endorsement by us of the site or any association with its operators.


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Zachariah Kelly is a writer at Optus, specialising in mobile technology and consumer electronics. With 6 years behind him covering the Australian tech landscape, Zac has written for several Australian news websites. When he’s not writing about the latest phones, he’s obsessing over electric cars and video games.

LinkedIn icon Connect with Zachariah


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