[android-developers] sms broascast

hi,all.
when i look up sms interception, i want to intercept
"android.provider.Telephony.SMS_RECEIVED" broadcast,and prevents it be
published to other receivers(such as system Messaging app).
what can i do ?

another quest: i'm confused that which app (or hardware) send out this
broadcast (if anyone familiars with this topic, it's grateful)
i just want to find out the origin of the broadcast.

--many thanks.

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