iOS detect incoming miss call in background -

how detect incoming miss call in ios, in background? used ctcallcenter has state disconnected. can't distinguish if call rejected user or remote.

i ctcall.h, seem it's impossible:

coretelephony_extern nsstring * const ctcallstatedialing  __osx_available_starting(__mac_na,__iphone_4_0); coretelephony_extern nsstring * const ctcallstateincoming  __osx_available_starting(__mac_na,__iphone_4_0); coretelephony_extern nsstring * const ctcallstateconnected  __osx_available_starting(__mac_na,__iphone_4_0); coretelephony_extern nsstring * const ctcallstatedisconnected  __osx_available_starting(__mac_na,__iphone_4_0);