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What do I do if I no longer use a registered device?

Last Updated: 04 Dec 2025

Deregister your device once you have decided to sell or give away your device. You can deregister it on the same or another device with the ASB Mobile Banking app or FastNet Classic internet banking. Here’s how:

ASB Mobile app:

  1. Log in to the ASB Mobile app.
  2. Tap the profile icon in the top left corner of the ‘Accounts’ screen.
  3. Tap ‘Settings’, and under ‘Devices’ select ‘Manage devices’.
  4. Select the device you wish to deregister and tap 'Remove device'.

FastNet Classic:

  1. Log in to your FastNet Classic account.
  2. Click on 'Settings' in the top right of the page.
  3. Click on ‘Manage devices’.
  4. Select the device you wish to deregister and click 'Remove device'.

Tip: You can review the date a device was last used by selecting more information

If you can’t access the Mobile app or FastNet Classic, call us on 0800 803 804, or +64 9 306 3000 if you are overseas Mon - Fri 8:00am  8:00pm, or 8:30am and 5:00pm Sat, Sun & public holidays to have your device deregistered. Consider backing up your content on another device first.

Then before you sell (or give away) your phone or tablet restore it to its factory settings. That erases all your personal data.

Here's how:

  1. Find the 'Reset' section of device’s settings menu.
  2. Follow the prompts.

Or check on the relevant website:


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