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 15GB 28-day plan
$30 every 28 days, 16GB a month. OnePass 200GB 365-day gives you at least as much data for $271 less in the first year.
- First year
- $420
- Two years
- $810
- Average a month
- $35
- Per GB, year one
- $2.00
Year two: about $391 ($29 less: year one has 14 recharges)
- eSIM
- 5G
- No lock-in
- Stops when data runs out
How it compares
- Ranks 14 of 14 for first-year cost among plans with 8GB to 24GB a month.
- $2.00 a GB in year one: 7% above the median of $1.87 for similar plans.
- 5 plans with at least as much data cost less in year one. The cheapest is OnePass 200GB 365-day, $271 less.
- The cheapest postpaid plan with at least as much data is Aussie Broadband 20GB, $60 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.
What you get
- Data
- 15GB 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 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 8GB to 24GB a month, cheapest first year first.
| # | Plan | Data a month | First year | Two years |
|---|---|---|---|---|
| 1 | OnePass200GB 365-day | 17GB | $149 | $349 |
| 2 | amaysim240GB 365-day | 20GB | $199 | $519 |
| 3 | OnePass22GB 28-day | 24GB | $275 | $600 |
| 4 | Boost Mobile240GB | 20GB | $300 | $600 |
| 5 | Pennytel10GB | 10GB | $312 | $624 |
| 6 | Superloop15GB | 15GB | $325 | $625 |
| 7 | amaysim15GB 28-day | 16GB | $420 | $810 |
Head to head
Your first year, payment by payment
14 payments in your first year, all at the standard price. That adds up to $420.
| Payment | Day | You pay | Data |
|---|---|---|---|
| 1 | 0 | $30 | 15GB |
| 2 | 28 | $30 | 15GB |
| 3 | 56 | $30 | 15GB |
| 4 | 84 | $30 | 15GB |
| 5 | 112 | $30 | 15GB |
| 6 | 140 | $30 | 15GB |
| 7 | 168 | $30 | 15GB |
| 8 | 196 | $30 | 15GB |
| 9 | 224 | $30 | 15GB |
| 10 | 252 | $30 | 15GB |
| 11 | 280 | $30 | 15GB |
| 12 | 308 | $30 | 15GB |
| 13 | 336 | $30 | 15GB |
| 14 | 364 | $30 | 15GB |
When the data runs out
When the 15GB 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 $2.00 a GB, the 112th cheapest of the 115 plans we track.
- The price stays the same all year, so there is no deal to run out.
- 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 15GB 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?
There is no deal on this plan right now. It costs $30 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.