Thanks for your efforts, Brian. Your customer service is never less than stellar!
I am still unable to hear any sounds from the iFly app through a headset on either my 2013 Nexus 7 or my Galaxy S4 phone. All other sounds (music,videos, etc.) are normal through the headset on both devices. I do hear faint button press sounds through the external speakers on both devices however. Are there any sound settings in the iFly app that I am not aware of? I have never seen any settings for volume or aubible alerts. I must be doing something wrong.