If your looking for how to record phone calls on iphone 7 / galaxy s8 then tapeacall is the answer. You can get the app here on the app store, or the play store as well. Unfortunately there is no other way to record a phone call without using an app, but this one is definitely the best in its category. The only downside to it is that its a paid app, but you can actually use it free for up to 60 seconds of recording. Anything over 60 seconds you will have to make the leap and purchase this app.
Another thing I like about tapeacall is that its very user friendly. If your looking for how to record phone calls on iphone 7 / galaxy s8 this app makes it extremely easy. You can check out the video above for how to actually use it, but its all done with the click of a button. You can then check your recorded calls by tapping the play button at the bottom of the screen.