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 120GB 28-day plan
$18 every 28 days to start, then $50, 130GB a month. Nothing we track with as much data costs less in the first year.
- First year
- $668
- Two years
- $1,318
- Average a month
- $56
- Per GB, year one
- $0.40
Year two: about $652 ($16 less: year one has 14 recharges)
- eSIM
- 5G
- No lock-in
- Stops when data runs out
How it compares
- Ranks 31 of 47 for first-year cost among plans with 65GB to 196GB a month.
- $0.40 a GB in year one: about the same as the median of $0.41 for similar plans.
- 2 plans with at least as much data cost less in year one. The cheapest is Tangerine 160GB, $68 less.
Worth knowing
- Deal ending soon: amaysim 120GB 28-day's deal ends on 19 October 2026.
- 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
$18 for the first recharge · sign up by 19 October 2026
New online services only. $18 for the first renewal, then $50 every 28 days. Ends 19 October 2026.
When the deal ends, the plan carries on at $50 every 28 days. Set a reminder and we'll email you two weeks before.
What you get
- Data
- 120GB every 28 days. 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 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
- Number Link (smartwatch) included
Download speeds are capped at 200Mbps. 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 65GB to 196GB a month, cheapest first year first.
| # | Plan | Data a month | First year | Two years |
|---|---|---|---|---|
| 1 | TPG100GB | 100GB | $405 | $945 |
| 2 | iiNet100GB | 100GB | $405 | $945 |
| 3 | Pivotel80GB | 80GB | $405 | $945 |
| 4 | Tangerine75GB | 75GB | $420 | $924 |
| 5 | Lyca MobileM 80GB | 87GB | $440 | $960 |
| 6 | OnePass65GB 28-day | 71GB | $440 | $960 |
| 7 | amaysim120GB 28-day | 130GB | $668 | $1,318 |
Head to head
Your first year, payment by payment
14 payments in your first year, 1 with the deal price. That adds up to $668, which is $32 less than paying full price all year ($700).
| Payment | Day | You pay | Data |
|---|---|---|---|
| 1 | 0 | $18 (deal) | 120GB |
| 2 | 28 | $50 | 120GB |
| 3 | 56 | $50 | 120GB |
| 4 | 84 | $50 | 120GB |
| 5 | 112 | $50 | 120GB |
| 6 | 140 | $50 | 120GB |
| 7 | 168 | $50 | 120GB |
| 8 | 196 | $50 | 120GB |
| 9 | 224 | $50 | 120GB |
| 10 | 252 | $50 | 120GB |
| 11 | 280 | $50 | 120GB |
| 12 | 308 | $50 | 120GB |
| 13 | 336 | $50 | 120GB |
| 14 | 364 | $50 | 120GB |
When the data runs out
When the 120GB 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 $0.40 a GB, the 31st cheapest of the 115 plans we track.
- Most of the saving comes from the deal: without it, the first year would cost $700.
- There is no lock-in contract, so you can leave when a cheaper plan turns up.
- Unlimited standard calls and texts to 42 selected countries.
Questions people ask
What network does amaysim 120GB 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. $18 for the first renewal, then $50 every 28 days. Ends 19 October 2026. After that the plan costs $50 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.