Most phones with Auto Focus Cameras do this, its normal.
WRT your in-call volume go to Settings -My Device -Call -scroll down to 'Personalise call sound' and set it to Clear sound, should be fine.
Samsung GALAXY S4 32GB Exynos Octa Black Mist
Samsung GALAXY S2 16GB Exynos Dual Ceramic White
Apple iPad 4 16GB White WiFi+LTE
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