Best Mobile Plans in Australia Under $20 (No Lock-in) — 2025 Guide
Looking for a cheap mobile plan in Australia that won’t lock you in or drain your wallet? You’re in the right place. Whether you’re a student, budgeting family, or just want to stop overpaying, here are the best no-contract phone plans under $20/month in 2025.
We’ve focused on:
✅ Ongoing (not promotional) prices
✅ No lock-in contracts
✅ Good data + value for money
✅ Coverage using major networks (Telstra, Optus, Vodafone)
🥇 1. Kogan Mobile – Small Monthly Plan
- Price: $14.90/month
- Data: 10GB
- Network: Vodafone 4G
- Extras: Unlimited calls/texts in Australia
Why it’s good: Solid data for under $15. Easy to recharge or cancel. Often runs promotions like 90-day plans for cheaper rates.
🥈 2. Amaysim – $15 Plan
- Price: $15/month
- Data: 7GB
- Network: Optus 4G/5G
- Extras: Unlimited talk & text + data rollover
Why it’s good: Reliable Optus coverage and data rollover means unused data carries forward (up to 200GB). No sneaky charges.
🥉 3. TPG – $12.99 Mobile Plan
- Price: $12.99/month (ongoing)
- Data: 6GB
- Network: Vodafone
- Extras: Unlimited standard AU calls & texts
Why it’s good: Dirt cheap if you’re a light data user. TPG’s website often has first 6 months at even lower prices.
🔥 4. Coles Mobile – $20 Prepaid
- Price: $20/month
- Data: 15GB
- Network: Optus
- Extras: Unlimited talk/text, data rollover, flybuys points
Why it’s good: Great for Flybuys users — you earn rewards while paying your bill. Comes with auto-recharge options.
🧊 5. Catch Connect – 30 Day Plan
- Price: $15/month
- Data: 8GB
- Network: Optus
- Extras: Often has bulk recharge offers (e.g. 90-day or 365-day)
Why it’s good: Catch is great if you prefer to pay for 90 days upfront and forget. Super flexible.
🛑 Important Notes
- ✅ All plans here are prepaid or month-to-month, so no lock-in contracts.
- ✅ If you’re on WiFi most of the day, you can easily get by with 5–10GB/month.
- ❌ Avoid plans that say “First 3 months only” if you want stable ongoing value.
💡 Tips to Save More
- 📶 Test the network before porting your number — some providers offer free SIMs.
- 🎁 Use referral bonuses – most MVNOs (like Amaysim) have $10–$20 referral credits.
- 🧾 Use ShopBack or Cashrewards to earn cashback when you sign up for a new SIM.
Final Thoughts
In 2025, you don’t need to spend $30 or more for reliable mobile data in Australia. These under-$20 mobile plans offer excellent value, great networks, and flexibility. As living costs rise, switching to one of these could easily save you $150–$300 a year.
