[android-developers] How android system establish a data connection

Hi All,

How android system try to establish a data connection at the time of
power up or when we set up an apn.

As I checked the framework code, DataConnection.java is a state
machine which interacts with RIL in order to activate/deactivate a
data connection. But when I put up any debug log in the
DataConnection.java ,it never gets hit either in success or failure
case.

When this file is used ?

Thanks,
Amit

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