So I upgraded my Jade to Icy White yesterday, will

my Jade green card now give me 5% CRO back or will I have to wait for my new card?

higher cashback is immediately available using the existing card

Awesome, thanks!

If you declined a card upgrade but upgraded the stake, you will get ALL benefits using the existing card, except for the Higher card limits, higher interbank rate limits (if your country uses interbank), and higher LoungeKey Benefits, only these three benefits require the actual physical card upgrade. Everything else (cashback rate, Prime rebate, higher crypto earn rates, etc.) will be available without upgrading the physical card

No way, I didn’t decline the upgrade, I want that Icy White! 😁

if you did not decline the physical card upgrade then at some stage your existing card will be cancelled, but anyway till that happens, the higher benefits (bar for some) will be available

Uh oh, well that be before my new one arrives?

Also is there any chance to keep the Jade and White both active? Was hoping the Jade could then serve as an AU card

No :/

possibly yes