Undefined symbols for architecture armv7:
  "_SCNetworkReachabilityCreateWithAddress", referenced from:
      +[GADGestureUtil reachability:] in libGoogleAdMobAds.a(GADGestureUtil.o)
  "_SCNetworkReachabilityUnscheduleFromRunLoop", referenced from:
      -[GADNetworkChecker stopNetworkChecking] in libGoogleAdMobAds.a(GADNetworkChecker.o)
  "_SCNetworkReachabilityCreateWithName", referenced from:
      -[GADNetworkChecker startNetworkChecking] in libGoogleAdMobAds.a(GADNetworkChecker.o)
  "_SCNetworkReachabilityScheduleWithRunLoop", referenced from:
      -[GADNetworkChecker startNetworkChecking] in libGoogleAdMobAds.a(GADNetworkChecker.o)
  "_SCNetworkReachabilityGetFlags", referenced from:
      +[GADGestureUtil reachability:] in libGoogleAdMobAds.a(GADGestureUtil.o)
  "_SCNetworkReachabilitySetCallback", referenced from:
      -[GADNetworkChecker startNetworkChecking] in libGoogleAdMobAds.a(GADNetworkChecker.o)
ld: symbol(s) not found for architecture armv7
collect2: ld returned 1 exit status

Answer

Please add the following framework in project.

Select the framework -> add New Framework -> Select AudioTollbox.framework, MediaPlayer.framework,MessageUI.framework and SystemConfiguration.framework add in the Framework folder.