We often get asked if you need a new modem when you change your internet plan, but there isn't exactly a simple answer to this question. There are cases when you'll be able to keep using your existing modem, but there are other times when you may need a new modem.
As a rule, your modem has to be compatible with your technology type. For example, if you're changing from ADSL to NBN, there's a chance you might need a new modem. But if you're just changing NBN plans at the same address, you won't need a new modem. Some providers force you to buy their modem - such as Telstra and Optus - but you've still got the choice to use your own. It does however mean missing out on benefits like 4G backup.
When can I use my own modem with a new internet plan?
These are the main situations where you should be able to use your modem with a new internet plan:
- If you're upgrading from ADSL to FTTN or FTTB NBN and already have a VDSL modem router, it will continue to work.
- If you're changing NBN plans at the same address, you can keep using your current modem or router.
- If you have an unlocked pocket WiFi, internet dongle, or portable hotspot and you're putting in a data-only SIM from a new provider.
When can't I use my own modem with a new internet plan?
These are the main situations where you may not be able to use your modem with a new internet plan:
- If you're upgrading from ADSL to HFC, FTTP, FTTC, Fixed Wireless, or Satellite NBN, you won't be able to use your existing modem.
- If you're moving from ADSL or NBN to either 4G or 5G wireless broadband, you'll need a new modem but this will be supplied with your plan. In the same vein, if you're moving from wireless broadband to NBN, you can't use the modem you were using for your wireless broadband plan with your NBN plan.
- If you're moving address and your new property has a different NBN type, you may not be able to use your current modem. You can read more about what kind of networking hardware you need for each NBN connection type in the Do I need a modem or a router section of this guide.
- If your modem is locked to your NBN provider, you may not be able to use your modem with a new provider. The vast majority of NBN modems should not be locked, but some features may not work when you change provider. For example, taking your Telstra or Optus NBN modem to another provider will disable 4G backup and you won't be able to use the modem for phone calls. If you're concerned about your modem being locked, talk to you provider before switching.
If you have both a modem and a router in your home network setup and your modem won't work with your new provider, you'll still be able to keep using your router.
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Is Telstra's NBN modem unlocked?
Telstra says its NBN modem is locked, but there also user reports that it will work with other providers. It may not work with all NBN providers, however. Telstra's NBN modem can't be used for phone calls or 4G backup if you leave Telstra.
Is Optus' NBN modem unlocked?
Optus' modem is not technically locked when it comes to NBN, but there are specific protocol and can't be reconfigured by an end-user. This means that the Optus NBN modem may not work with all other NBN providers. In addition, the Optus NBN modem can't be used for phone calls with other NBN providers, and 4G backup will not work if you leave Optus.
Is Vodafone's NBN modem unlocked?
Vodafone's NBN modem is completely unlocked and can be used with any other NBN provider. You can even replace the SIM used for 4G backup with your own, but you will need to manually change some settings to get it working.
Do I need a modem or a router?
Both a modem and a router are essential in getting online, but the exact type of device you need will depend on what kind of NBN connection you have at your home or office.
If your provider includes a modem with your plan, the hardware should match your connection type and everything will work out of the box. If you'd prefer to buy your own, you'll need to ensure you're buying the right type of networking hardware. Here's what you'll need for each different connection type:
- Fibre to the Premises NBN: You'll need a router. This will plug directly into your NBN connection box mounted to your wall.
- HFC NBN: You'll need a router. This will plug into the NBN connection box
- Fibre to the Node NBN: You'll need a modem router. This will plug into the telephone socket used to facilitate your NBN connection.
- Fibre to the Building NBN: You'll need a modem router. This will plug into the telephone socket used to facilitate your NBN connection.
- Fibre to the Curb NBN: You'll need a router. This will plug into the NBN Connection Box supplied by NBN Co for free.
- Fixed Wireless NBN: You'll need a router. This will plug into the connection box supplied by NBN Co.
- Satellite NBN: You'll need a router. This will plug into the satellite modem that NBN Co supplies for free.
Read more about the difference between modems and routers in our guide here.
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