The Galaxy S7 doesn’t have a removable battery, meaning you can’t pull out the battery if it’s frozen or unresponsive.
That is all you need to know about doing a quick reboot or reset on the Samsung Galaxy S7 and Galaxy S7 Edge.
For the S7 Edge, Samsung has three different S-View Flip cover cases.
There's the traditional flip cover with a window like previous years, a clear model, and a LED flip case.
If this is the case you should issue a forced reboot, 99% of the time this resolves the spinning wheel issue entirely and you’ll be back to using the i Pad or i Phone as usual.
You’ll know this has worked because the screen will turn black and then an Apple logo will appear.