It's totally up to you what mobile phone you use! With OVO you'll need to BYO mobile phone - it doesn't matter if it's shiny and new or older.
There's just a couple of things to keep in mind:
Check it's 4G enabled
Your mobile needs to be 4G enabled to be compatible with OVO's SIM cards. Even if you're not planning to use your phone on the 4G network and (or!) you're not able to get 4G coverage in your local area, the device itself needs to be 4G enabled.
Make sure it's unlocked
If you bought your phone from another telco (like Telstra or Vodafone), it could be locked to their network. That means the phone won't register on our network until it's unlocked - it doesn't matter whether you're no longer in contract. If you're not sure if your mobile phone is unlocked you'll need to ask the company (or person) that you bought it from. If it's unlocked, the telco that it's locked to will be able to unlock it - you just need to ask them to do it.
It should take a SIM card
When you sign up to OVO you'll receive a SIM card and you'll need to carefully place this into your phone. It might seem obvious, but make sure your phone takes a SIM card. With OVO it doesn't matter what sized SIM card it takes - all our SIM cards are multi-fit. That means you can carefully pop out the right sized SIM card for your phone: nano, micro or standard sized.