Will Executive pro + amp work with iPhone?

Short answer...NO

It is possible to physically connect a corded Executive Pro with the amplifier to an iPhone using a series of adapters. However, there is no way to make the iPhone use the headset mic, as you can't change the device settings like you can in a computer.

So please do not offer this as a solution, as it wouldn't work properly. Thank you, Alex for testing this out for us!