Best SIM-only plans for June 2021

Lock in a postpaid SIM-only deal as the financial year winds to a close this June.

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With hundreds of mobile plans in the market, it can be hard to decide which one's best for your needs. That's why we're here to help you narrow down your choices with our picks for the best SIM-only plans this month.

We've picked out the best plans in four different categories, with a couple of runner-up options to choose from too.

Best SIM only plans for June 2021

Best value SIM only plan:

Circles.Life 100GB Monthly Plan

SIM-only - Postpaid

Circles.Life's 100GB deal is amazing value for SIM-only mobile users.

The truth is, you probably won't need to use 100GB over a month, but at a low price point of $28 a month for your first 12 months, this offer is too good to give up.

  • 100GB per month
  • Unlimited calls & texts
    Optus network
  • $28 per month
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Why we chose it:

  • 100GB of data is amazing at this price
  • 3GB of bill shock data means it's really 103GB
  • Full 12 month discount for new customers

Once again, there's a big old gap between the value proposition offered by Circles.Life and its competitors in the SIM-only space. You basically get an additional 3GB thrown in for free thanks to its 'bill shock protection'. This 3GB gives you a buffer zone to decide whether you want to buy another data pack to last you till the end of the month, or if you're willing to let go of further data usage. It's also a discounted deal, yours for just $28 per month for a full 12 months, at which point it jumps back to $38 a month.

Best cheap SIM only plan:

Westnet Mobile Large Plan

SIM-only - Postpaid

55GB for $20 per month for a half-year is a solid deal. You won't find too many cheap deals being offered by postpaid providers (take a look at prepaid plans for better cheap deals), but Westnet's current offer makes it pretty attractive.

You'll score 50% off its original price for the first six months before reverting back to $39.99 a month.

  • 55GB per month
  • Unlimited calls & texts
    Vodafone network
  • $20 per month
Learn more

Why we chose it:

  • 50GB of data
  • 6 month discount
  • 100 international calling minutes

Westnet's offer this month is one of the few gems out there, which cuts the plan price of its $39.99 plan in half for six months with 55GB of data on parts of the Vodafone 3G and 4G network.

Best big data SIM only plan:

Circles.Life 100GB Monthly Plan

SIM-only - Postpaid

Circles.Life remains the gold standard for high data SIM-only plans.

Circles.Life's 100GB deal is the one to beat, and few come even close, especially at this price point. Grab it before July 1st and you'll get it for $28 a month for the first 12 months, and then $38 a month after.

  • 100GB per month
  • Unlimited calls & texts
    Optus network
  • $28 per month
Go to site

Why we chose it:

  • 100GB of data at a great price
  • 3GB of bill shock bonus data
  • A full year's discount for new customers

If you're looking for big data that won't break the bank, you'll be hard pressed to find a better plan than this one from Circles.Life. There are bigger data limits available from Optus and Vodafone, but you'd be looking at a higher monthly price for these plans. We stand by that Circles.Life's 100GB plan is the best high data plan at an affordable price.

Best SIM plan for international calls:

Vodafone $120 SIM-only Ultra Plan

SIM-only - Postpaid

Vodafone combines healthy international calling inclusions with great data deals for an all-round winner of a SIM-only plan.

You'll get a hefty 50% off the plan price for the first 12 months if you sign up before the end of the month. Keep in mind that the price reverts to $120 a month after this, but there's no lock in contract to keep you with Vodafone.

  • 500GB per month
  • Unlimited calls & texts
    Vodafone network
  • $60 per month
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Why we chose it:

  • Good mix of unlimited and calling minutes
  • 500GB of data plus speed shaping
  • 50% off the monthly price for 12 months

Vodafone is an international brand, and so it's not too shocking that its plans often include really good international call inclusions. The $120 SIM-only plan is currently on sale at half price, but you get the full allotment of call inclusions, with unlimited calls to "Zone 1" countries and 300 further minutes if you're calling a "Zone 2" country. Add in 500GB of data and shaping to a generous 25Mbps when you hit your limit and you're sitting pretty with a great and affordable mobile deal.

How to find the right plan

If you're happy with your handset, a SIM only plan can save you a lot of money, as long as you compare the right details to ensure the best possible value. Here's what you should consider:

Calls and texts on your network

You can get unlimited standard local and national calls and texts for very little money these days, so if you're just a chatter and texter, don't pay more than you have to.

MVNOs are fighting over data

Make sure you get a plan with enough data to avoid paying extra charges.

5G isn't cheap (yet)

If you're keen on the next big thing in mobile, and are in the right spot, you've only got a few options.

Don't be afraid to switch!

SIM only plans are only getting better value over time and switching is a quick process.

Do I need any international inclusions?

Consider whether you need a plan with international calls and text included.

Frequently asked questions about SIM only plans

Which SIM only plan is best?

This depends on your mobile needs, but this month, we've named Circles.Life's 200GB plan as our best overall value pick.

Can I keep my old phone number with a SIM only plan?

Yes! All mobile providers are legally required to port your current number over to your new service. To find out how to do this, see our guide to number porting.

Is SIM only cheaper than a phone plan?

SIM only plans aren't inherently cheaper, since you'll be paying about the same for your phone whether you buy it outright or on a contract. The main benefit comes from finding a competitive monthly plan, rather than being locked into an expensive one.

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