What happens to an anonymous user’s ID if he buys a subscription on device A, then restores on device B.
Will device A still be logged in?

I found it in the documentation:

Transfer - If a user buys a subscription with an anonymous ID ( account A) and then restores with an identified user (account B) as long as they are logged in with the same underlying store account the store receipt will transfer to account B and only account B will have access to the subscription. 

how to understand it for different devices?
Will the subscription be available for deviceA and deviceB or only for deviceB?