When I build the app from my project and deploy it on device for debugging, it keeps getting error "App installation failed", "The application could not be verified".
I tried the solution from similar topic which said "Delete old app on device and deploy again" but didn't worked. I also created new single-view project to test, disable codesign in build setting then deploy, still getting the same error. It happened to every projects I tried to deploy app on device.
I'm using Xcode 6.4 on OS X Yosemite 10.10, deploy to iPhone 5s (jailbreak) iOS 8.4. Xcode's SDKsetting.plist was edited to allow deploying (CODE_SIGNING_REQUIRED=NO, AD_HOC_CODE_SIGNING_ALLOWED=YES).
After trial and error, I finally found the solution!
Now everything works as expected.