No, I don't have another iOS device. AND, there IS no
"old passcode". It's referring to the exact same iPad. :(
(I should have said "older NAME"
rather than "older VERSION" == same iPad.)
I solved it myself ultimately:
- Remove ALL Apple devices from ALL approvals, leaving only the Android phone as a "device"
- This ensures all authorizations will be SMS to the phone
- (There IS no way to Approve from a non-Apple device.)
- Remove all saved backups etc of the iPod
- Reboot ALL devices on the account. Turns out Apple's 2FA system draws on data from any connected computer/iTunes/device, and "sees" even old, nonexistent device info in a connected computer.
- NOW I could do a factory reset on the iPad properly.
It STILL wanted me to give a passcode from the old iPad name... but then there's one more step:
- When the iPad asks for a passcode from the nonexistent Other iPad, ignore and reboot instead
- (I realized something was strange: at that point, the iPad was Trusted (getting auth popups), yet was supposedly not Approved/Verified/Authorized?!)
- On power up, all is well!
