These prices were checked on 15 October 2026, more than 30 days ago. Check the provider's page before you buy.
amaysim · Prepaid · Optus network
amaysim 42GB 28-day plan
$12 every 28 days to start, then $35, 46GB a month. Nothing we track with as much data costs less in the first year.
- First year
- $421
- Two years
- $876
- Average a month
- $35
- Per GB, year one
- $0.61
Year two: $456 ($35 more)
- eSIM
- 5G
- No lock-in
- Stops when data runs out
How it compares
- Ranks 30 of 50 for first-year cost among plans with 23GB to 68GB a month.
- $0.61 a GB in year one: 20% below the median of $0.76 for similar plans.
- 8 plans with at least as much data cost less in year one. The cheapest is TPG 50GB, $106 less.
- The cheapest postpaid plan with at least as much data is Pivotel 50GB, $106 less over the first year.
Worth knowing
- This plan carries a note that a detail wasn't stated or couldn't be read (for example what happens when data runs out), so check the provider's page before you buy.
The deal
65% off plus bonus data (75GB, $12) for three renewals · sign up by 15 November 2026
New online services only. $12 and 75GB (42GB plus 33GB bonus) for three renewals, then $35 for 42GB every 28 days. Offer ends 15 November 2026; activate by 30 November 2026.
When the deal ends, the plan carries on at $35 every 28 days. Set a reminder and we'll email you two weeks before.
What you get
- Data
- 42GB every 28 days, 75GB during the deal. Data stops until you recharge or buy more.
- Calls and texts
- Unlimited standard national calls, SMS and MMS
- Overseas calls
- Unlimited calls to selected countries. Unlimited standard calls to 28 selected countries and texts to 42 selected countries
- Roaming
- Not included. International roaming is sold separately
- Renews
- Prepaid recharge every 28 days
- Features
- 5G, eSIM, No lock-in
- Extras (not counted in the price)
- Unlimited Data Bank: unused data rolls over to the next recharge
- Data Top-Up: $10 for 1GB
Download speeds are capped at 150Mbps. Subject to amaysim's Fair Go Policy.
amaysim's Critical Information Summary doesn't say what happens when data runs out; extra data is bought as a $10 per 1GB Top-Up, so we treat data as stopping.
Plans with similar data
Plans with 23GB to 68GB a month, cheapest first year first.
| # | Plan | Data a month | First year | Two years |
|---|---|---|---|---|
| 1 | OnePass360GB 365-day | 30GB | $179 | $479 |
| 2 | Pivotel25GB | 25GB | $206 | $481 |
| 3 | TPG30GB | 30GB | $270 | $630 |
| 4 | iiNet30GB | 30GB | $270 | $630 |
| 5 | OnePass22GB 28-day | 24GB | $275 | $600 |
| 6 | Moose Mobile30GB | 30GB | $276 | $552 |
| 7 | amaysim42GB 28-day | 46GB | $421 | $876 |
Head to head
Your first year, payment by payment
14 payments in your first year, 3 with the deal price. That adds up to $421, which is $69 less than paying full price all year ($490).
| Payment | Day | You pay | Data |
|---|---|---|---|
| 1 | 0 | $12 (deal) | 75GB |
| 2 | 28 | $12 (deal) | 75GB |
| 3 | 56 | $12 (deal) | 75GB |
| 4 | 84 | $35 | 42GB |
| 5 | 112 | $35 | 42GB |
| 6 | 140 | $35 | 42GB |
| 7 | 168 | $35 | 42GB |
| 8 | 196 | $35 | 42GB |
| 9 | 224 | $35 | 42GB |
| 10 | 252 | $35 | 42GB |
| 11 | 280 | $35 | 42GB |
| 12 | 308 | $35 | 42GB |
| 13 | 336 | $35 | 42GB |
| 14 | 364 | $35 | 42GB |
When the data runs out
When the 42GB runs out, mobile data stops until the plan renews or you buy more. You are never charged extra, but you can be left without data late in the month. Unlimited Data Bank: unused data rolls over to the next recharge.
Is it good value?
- Year one works out at $0.61 a GB, the 66th cheapest of the 115 plans we track.
- Most of the saving comes from the deal: without it, the first year would cost $490.
- There is no lock-in contract, so you can leave when a cheaper plan turns up.
- Unlimited standard calls to 28 selected countries and texts to 42 selected countries.
Questions people ask
What network does amaysim 42GB 28-day use?
amaysim uses the Optus network. It rents capacity from Optus, so coverage follows Optus's towers. Check Optus's coverage map for your street.
What happens when the deal ends?
New online services only. $12 and 75GB (42GB plus 33GB bonus) for three renewals, then $35 for 42GB every 28 days. Offer ends 15 November 2026; activate by 30 November 2026. After that the plan costs $35 every 28 days.
Can I use it overseas?
Not included. International roaming is sold separately.
Is there a contract?
No. It has no lock-in contract. It renews when you recharge.
How was this checked?
On 14 October 2026, from amaysim's own pages. Prices older than 30 days are hidden from the comparison. We are not paid by providers to rank them.
Sources
Checked 14 October 2026 on amaysim's own pages: amaysim SIM plans · Critical Information Summary (valid from 2 October 2026). Always read the Critical Information Summary before you buy.