I have one problem with code signing.
My cordova app is running in simulator well.
Previosly it was running well with code signing certificate even we published app in app store also.
Now when my certificate was expired then i renewed it and used it to build an app but now it is not running ad hoc in specified devices whose Ids included in profile.
Every time it gives an error Unable to Download App "xxx" could not be installed at this time.
For above error i got some solution on web like restart phone, reset settings in phone, wifi etc... but nothing works.
So please help me...
Even I tried with all new certificates and provisioning profiles but problem is still there.
i've experienced numerous problems similar to yours and sometimes i have found a fresh reboot of system fixes most, try it