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Best SIM Only Plans for September 2020

Circles.Life has smashed three out of four SIM only categories this month with their data-heavy, affordable plans.

Updated . What changed?

Fact checked

Best SIM Only Plans - September 2020

Finder best sim only badge next to Circles logo

  1. Best value SIM only plan: Circles.Life 200GB for $28 SIM-only Plan
  2. Best cheap SIM only plan: Circles.Life 50GB for $18 SIM-only Plan
  3. Best big data SIM only plan: Circles.Life 200GB for $28 SIM-only Plan
  4. Best SIM plan for international calls: Boost Mobile $30 28 Day Expiry Prepaid Plan

In September, Circles.Life continues to absolutely dominate the market for truly affordable SIM only plans, thanks to that hefty Finder-exclusive 200GB $28 offer, which is far and away the best value you can get – a tip-top match for those looking for a big data, low cost SIM only plan. The one area where Circles.Life is less competitive is if you're after a plan with international calling inclusions, where it's hard to look past the prepaid space, and especially Boost or amaysim's deals.

Best value SIM on a plan (+ 3 alternatives)

Circles.Life 200GB for $28 SIM-only Plan

SIM-only - Postpaid

Circles.Life's 200GB deal is amazing value that its competitors simply cannot match if you want a huge quantity of data on a month-by-month SIM only basis.

To use our Finder exclusive deal, simply click 'go to site' and we'll have the coupon code applied at the checkout.

  • 200GB per month
  • Unlimited calls & texts
    Optus network
  • $28 per month
Go to site
Why we chose it:
  • More data than any other plan
  • 3GB of "bill shock" protection data
  • Unlimited standard calls/texts

Ever since it launched in Australia, Circles.Life has redefined the value equation for SIM only plans with the inclusion of amazing quantities of data for prices lower than we've ever seen before. Circles.Life doesn't bundle a lot of extras, although if you are truly voracious for mobile data, its 3GB Bill Shock protection – effectively 3GB of additional free data over and above your quota before it starts costing you a single cent more – is quite nice. You can get unlimited standard calls and texts from just about anyone, but what smartphone users tend to want more of is data, and Circles.Life's 200GB deal is extraordinary in this respect, unlike any competitor plans by a very wide margin.

Best cheap SIM only plan (+ 3 alternatives)

Circles.Life 50GB for $18 SIM-only Plan

SIM-only - Postpaid

If you're working on a tight budget but still need plenty of mobile data, along with unlimited calls and texts, there's nothing right now that even comes close to comparing with Circles.Life's 50GB plan.

To use our Finder exclusive deal, simply click 'go to site' and we'll have the coupon code applied at the checkout.

  • 50GB per month
  • Unlimited calls & texts
    Optus network
  • $18 per month
Go to site
Why we chose it:
  • A huge quantity of data for under $20
  • Extra 3GB of data effectively for free

It's not quite as alluring as its 200GB plan – and if you can stump up the extra $10/month that's the plan we'd go for – but if you're looking for value under $20/month, right now you should be staring intently in the direction of the Circles.Life $18 SIM-only plan. Like its other plans, you're not awash with other perks or fancy inclusions aside from 3GB of effective "bonus" data to shield you from bill shock, but in the sub-$20 space, nobody really expects that many bonus offers anyway.

Best big data SIM only plan (+ 3 alternatives)

Circles.Life 200GB for $28 SIM-only Plan

SIM-only - Postpaid

200GB of data isn't to be missed if you're a heavy data user, and the fact that you can score it for less than half you'd pay for half the data or less just makes the Circles.Life deal that much more compelling.

To use our Finder exclusive deal, simply click 'go to site' and we'll have the coupon code applied at the checkout.

  • 200GB per month
  • Unlimited calls & texts
    Optus network
  • $28 per month
Go to site
Why we chose it:
  • 200GB of data can cover a lot of use – even video streaming
  • Way ahead of the competition on a dollars-per-GB basis

Time was if you wanted lots of data on a mobile plan, you had to PAY for it, and we're capitalising there for a very good reason. It's starting to feel a tad repetitive, but Circles.Life takes the crown for the best big data SIM only plan as well, because the value equation of its $28/month plan is absolutely leading the market right now. Frankly, even its regular 100GB suit, it's a fancy deal, but why not take advantage of as much data as you can get your hands on for the same price?

Best SIM plan for international calls (+ 3 alternatives)

Boost Mobile $30 28 Day Expiry Prepaid Plan

SIM-only - Prepaid

You've got to match it up to the country you want to call, but with unlimited calls to 20 countries and calling minutes for 35 more, Boost Mobile's plan is a great match if you call overseas frequently.

The fact that Boost is on the Telstra network (giving it great domestic coverage) is a cool bonus as well.

  • 34GB per 28 days
  • Unlimited calls & texts
    Telstra network
  • $30 per 28 days
Go to site
Why we chose it:
  • Includes unlimited calls to 20 popular destinations plus 100 calling minutes to 35 more
  • 34GB of included data on first 3 recharges
  • Unlimited standard national calls and texts

Picking the "best" international calling SIM-only plan is a tricky prospect, because the real value here is in including the country you need to call, and nobody has a planet-wide deal just yet. We're giving the gong to Boost Mobile's SIM-only prepaid $30 deal. Its baseline of 20 countries for unlimited calls covers a wide range of locations that many Australians have personal or business dealings in. Add 100 minutes to call 35 further destinations and you're looking at a great value package overall.

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 & texts on your network

You can get unlimited standard local/national calls & 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.

FAQ 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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