How to keep mute button available during call I use my iPhone for conference calls regularly, with a Bluetooth headset/microphone. Often I keep my mic muted except for when I speak.

It is awkward that when I want to speak, I need to wake-up and unlock my phone, before pressing the mute button.

Is there a way to make my phone stay awake during calls, without changing the sleep/lock settings generally?
In iOS10 you can just tap the number + call duration in the lock screen and it'll bring up the phone controls.