iPhone 5 iOS7: Prevent screen from locking during voice call

To summarize in an actual answer: no, this feature has not been included in iOS - as of iOS 7.

As you are aware, the proximity sensor disables the screen when the phone is close to your ear (to avoid accidentally selecting options on the screen, and reduce battery drain), and you can choose to have the phone auto-lock after X number of minutes, but these two features do not work together at all.

Perhaps a somewhat plausible workaround would be to have your passcode, if applicable, only engage after a set amount of lock-time. That way, at least you wouldn't have to enter in your passcode to resume activity on the device after a phone call.

Otherwise, unfortunately, like many other things on iOS, there is remarkably little "hacking" or workarounds that are available unless you decide to jailbreak your phone.

This bugged me for a while. I just found out that (on my phone anyway) if you slide your finger from left to right on the name of the caller, you will see your call menu again.

I agree with the frustration. If I am on a conference call on mute, and someone asks me a questions, I have to unlock my phone first before I can unmute. During such time, I hear people on the other end of the call asking I am still on the line.

Mentioning that the lock/passcode and time limits is enforced by my employer - this is a company owned phone. I cannot change the settings.

It would be ideal to have the phone lock during a call but no passcode protected.

I've just updated from iOS5 to iOS7 and this is a major drawback. A 3 swipe process to hang up a call is fundamentally flawed IMO.

You can hangup by hitting the power button. This doesn't help if you're on 'mute' in a teleconference though.