How Can i activate/deactivate a PDP context in the Android phone by calling an API??

Question

Hi,

i need to activate/deactivate a PDP context in an android phone. so i accessed the telephony database of the phone and changed the APN settings (MCC,MNC, APN name) using SQLITE.(via a perl script)

But this mechanism is only changing the database and not updating the "android.provider.telephony"

could anybody help me how can i make those changes happen automatically when i change the database file (telephony.db)

objective here is to it with automation like what i am doing in changing the database contents rather than writing an java app.

thanks rocky