Source: How to stream 3D movies from your PC to your Gear VR | Android Central
Samsung’s Gear VR is designed to work with Samsung smart phones. However, with the right viewing apps, it can sometimes be used to view VR and 3D videos with non-Samsung smart phones.
At the time I bought a Gear VR headset, it was apparently the only type of “Google Cardboard” Viewer headsets that included a diopter adjustment to correct for near or far sightedness. Basically, going back a year or two, VR viewers were unusable by most people over age 45 due to presbyopia (and the need to wear reading glasses as we get older).
I use the Gear VR to view some VR content using an old Nexus 4 phone and an app that supports either a Bluetooth mouse button for clicking. The Gear VR otherwise only supports clicking with Samsung phones but you can pair a Bluetooth mouse to your smart phone and use the mouse button (or the mouse pointer!)