Similar to this mega thread https://www.ozbargain.com.au/node/890072 but it appears that the Samsung EDU & EPP offer is also available to existing Westpac debit card and credit cardholders.
I found the Samsung deal by:
1) Signing into Westpac Online Banking (I believe you need to go through Online Banking and can't copy and paste the Samsung URL?)
2) Go to "Westpac Rewards"
3) Click on "Discounts and Extras"
4) Click on the Samsung offer which has the following offer details
"Enjoy up to $839 RRP on your new device*.
20% discount for Westpac customers
$100 Bonus Trade in for S25 Base, Plus models.
$150 bonus trade in for S25 Ultra model
50% off 2 Year Samsung Care+"
Mods - happy for you to merge this thread with the other one
we need atleast $500 Trade bonus
Edit: I was trying to add the Bonus $400 code and it stacks with that. also can add GALAXY2025, but for only $100 off, not $200 anymore and have to add something atleast $200 worth, so i added Buds 3 pro which are also 40% off for $239.