The In-Application Purchase (IAP) API is now available on the following devices:
  • Series 40: Nokia Asha 302, Nokia Asha 303, Nokia Asha 201, Nokia Asha 200
  • Qt on Symbian: All* Symbian^3 devices

    (* Nokia 603 is temporarily not available, we are working on having it restored in the IAP-enabled list soon)
The good news is that if your application is IAP enabled and published already for one of these devices, it will also very likely work on the other ones from the same platform. So if your application is now published for Nokia 303, why not look into publishing it on the other supported Series 40 devices as well?