IAP would be powered via power adapter. This would allow option in case of Internet ISP outage or if traveling. Configuring an Instant device at a hotel requires that the hotel manually activate service for the Instant device (by providing the MAC address for the Instant router). In this configuration, we could connect power at the hotel, plug USB cable to Instant router and iPhone (or 3G/4G iPad for that matter), and get online via the 3G/4G connection.
Associate working from a client's office could bring the small RAP3, connect up, and get online without connecting to the client's network (many do not provide guest access).