Raspberry Pi 2 on the go media player running OSMC

You do understand that if you connect the phone to a hotspot run by the pi, that the phone will now no longer have a data connection until it’s disconnected from the hotspot? This is the first reason why you would rather run the hotspot from the phone and have the pi connect to it.
This thread below address all of this and more…

Also, I think there have been reports of Rpi not dealing with sdxc (very high capacity) sdcards… If it seems to be a problem when you try to install, you could try installing to a smaller card and using the sdxc in a usb adapter maybe?