It's super easy to make the switch from Android to iOS on Fi.
Follow these steps, and you'll regain access quickly:
Once you've completed the process, we'll update your device details too.
However, now you won't be able to use your Savings Account from your old device. TL;DR: No backsies!
Before you update your details: Make sure that your ATM Card is activated & you've set a Card PIN.
Also, ensure that you haven't frozen/suspended your card.