App built with xCode 7.3 won't install on iPhone 4/iOS 7.3.1 -


i have app built , deployed app store xcode 7.3, not install on iphone 4 ios 7.1. supported architectures arm64, armv7, armv7s , ios deployment target set ios 5.1.1.

any ideas other settings affect ability of app installed on iphone 4/ios 7.1 when built xcode 7.3. previous versions built xcode 6 worked ok.

ok turns out app installing crashing on startup due use of api not supported in older ios 7.1 maximum ios version can upgraded on iphone 4. invalid method being used nsstring contains:

one challenge testing on iphone 4 devices testflight doesn't install on devices (testflight needs ios 8.0+) , xcode 7.3 doesn't support download of ios 7.1 simulator build. manual install onto physical device required reproduce.


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