I have an app that is loaded onto one of my development phones. The provisioning profile that was used for this app will expire in a couple of days. So, after the provisioning profile expires will the app will cease to function? or does the provisioning profile expiration only affect building and installing the app on the device?
Once the profile expires you will be unable to launch the app. You can go to the Provisioning Portal ( http://developer.apple.com/ ) on the apple site and renew the provisioning license - once an updated provisioning license is installed on the phone the app will function again (i.e you won't need to do a rebuild).