What is a phone, if not a device primarily meant for communication? In this regard, the Samsung Galaxy S8+ serves its purpose rather well. You will seldom be taking calls on this phone with the earpiece volume set to maximum because it is simply too loud. I’ve always been a big proponent of “better to have it and not need it, than need it and not have it.” The volume levels on the S8+ live up to this principle in every which way. Provided your carrier isn’t subjecting you to poor connectivity, the sound coming through the earpiece and going out through the microphone, both are of excellent quality.
The speakerphone on the Galaxy S8+ follows in the footsteps of the earpiece. Samsung has traditionally managed to always put very high fidelity speakers into their flagship phones and the S8+ is no different. Take calls on the speaker and if its not loud enough on full volume, hit the extra loud button. There really isn’t much to write about the call quality of the Galaxy S8+ because it is every bit as good and clear as you’d expect from a flagship device.