Spoof WiFi settings as 'On' but use Cellular Data (for specific apps or in total)

*Alternatively*, can android force an app to use Cellular data? **The app in question:** Amazon Video [Version 3.0.57.30110 "Prime Video for Android Software"] **Device in use:**Samsung Galaxy Note 4 - Android Version: 5.0.1 Build LRX22C.N910TUVU1COG2 (USA TMobile Completely Stock, No Root etc) **Issue:** AV doesn't allow 'download for offline viewing' of media larger than 50mb in size. The app wants to see the device is connected to a WiFi network to allow downloads. **Why this is an issue:** When travelling, I use my unlimited network to download media for offline use when leaving network coverage areas (wilderness, trains/planes etc) - with an unlimited cellular plan, I don't care about what size file I'm downloading; Amazon is undoubtedly attempting to help users from inadvertently maxing out their data plans and blaming Amazon in the process (yes, those users exist)... Interestingly, a cellular hotspot will allow download - as the app see's the device as being on a WiFi Network. **Restating the Question:** Is there a way to either, force the app into using cellular data, or, spoof the phone's wifi state as 'on' but use cellular data anyway? Research: Reading other threads, this problem is unique in the sense that wifi is not an option to use - assume i only have cellular data; how can i use apps that request wifi for their functions?