With a Linux decoder such as Octagon (with Openatv e Kodi) you can see your TV on your smartphone. Provided that you have Kodi both on decoder and on smartphone.
- Install on your smartphone Kodi app
- in Kodi install a PVR client such as enigma2
- configure the correct IP of your decoder (something like 192.168.1.166) and your decoder Kodi credentials
- you should be able to see your TV, as in the following image