Java Development

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On a blackberry curve 8320 with the 4.5 version of the OS (and SDK), I am doing the following:

* Initiate a phone call

* Send phone app to the background

* Run an App that does data transfer, can see that data transfer is "blocked" due to live call being in progress

* With call still in progess, invoke RadioInfo.isDataServiceSuspended(), which to my surprise returns false.

According to the docs:

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isDataServiceSuspended() indicates whether data services are temporarily suspended at the present time. Data services are suspended on class B networks when the phone is active.

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This seems like exactly what is happening in my case, yet isDataServiceSuspended() returns false.  Am I mis-interpreting the docs?  if so, under what scenarios isDataServiceSuspended() actually useful?  Is there another way to see if data transfer is "on hold" due to a live call?

My data connection is an unlimited data plan from T-Mobile USA, and it currently says I'm in "edge" coverage (as opposed to EDGE).  I did see this thread http://tinyurl.com/bg79k5 which discusses not getting simultaneous voice/data over edge connections, but couldn't find the answer there.

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I think I figured out what was going on -- I was connected via Wi-Fi, and so even though the GPRS connection was

suspended, the Wi-Fi connection was not, and so isDataServiceSuspended() returned false because it saw the Wi-Fi as an available data connection.  When I turned off the Wi-Fi radio and retested by placing a call, then isDataServiceSuspended() returned true as I was originally expecting.

Even if I set Mobile Network Options / Connection Preference to Mobile Network Only, isDataServiceSuspended() still

returns false if I am connect to a Wi-Fi access point.  So that preference cannot make it ignore the Wi-Fi connection.

Ideally isDataServiceSuspended() would take a waf (Wireless Access Family) argument so it would be possible to specify which WAF you are interested in.