Hi,
I ran into an issue while implementing subscription for Android. I am trying to allow user to upgrade one a Basic plan ($10) to Pro plan ($40). Here, both Basic and pro plan is a monthly plan.
I bought Basic plan, then I wanna upgrade it to Pro plan, but it returns me “Couldn't find existing purchase for SKU”.
In my understanding, the product id (entitlement) is the SKU. Please correct me if am wrong. Any help would be greatly appreciated.