When we try to run the iOS app on an older device we can get such info.
From the xcode project info we can change the setting but the problem (that's what happened for me) will persist.
To lower the development target we need to change
IPHONEOS_DEPLOYMENT_TARGETin the file
for esample I added
IPHONEOS_DEPLOYMENT_TARGET = 4.0
Now xCode 7.3 runs without problems my app (sdk ios 9) the application on iphone 4 with iOS 7.1.2.
In my case it's a cordova project without particular plugins.
The xCode generated error:
iPhone runs iOS 7.1.2, which is lower than app's minimum deployment target. Change your project’s minimum deployment target or upgrade iPhone di businessweb’s version of iOS.