Use a decent pair of BT or wired headset/buds/speaker, and you're no longer putting a (potentially hot-running) cell radio up to your head and regain use of both your hands.
Any phone bigger than an iPhone SE is completely unusable for me, as it requires two hands to control the whole screen. The screen of the SE allow me to reach everything with just my thumb, which is awesome.
Use a decent pair of BT or wired headset/buds/speaker, and you're no longer putting a (potentially hot-running) cell radio up to your head and regain use of both your hands.
Much safer for driving too.