iPhone 3GS - Battery Problem, Phone App

[iphonepart3gs]

I just noticed that every time I enter the Phone App built into the iPhone 3GS, the round, spinning network indicator, which is located next to the 3G icon at the top of the screen, is in use. This indicates that the iPhone is accessing the network even when the phone is not in use. I don't recall this happening on my old 3G. Does anyone else notice this phenomenon? Could this be the culprit in the huge battery drain issues that many face?

 

[iphonepart3gs]

bump

 

[tico24]

Thats just the visual voicemail 'calling home'

 

[iphonepart3gs]

I doubt it. I don't recall my 3G exhibiting the same behavior. Also, it continues to be in "thinking mode" as long as the app is open. If it were the visual voicemail, it would stop activating the network once it had pinged the voicemail properly (similar to how it stops spinning in Safari once a webpage is fully loaded).

Can anyone else confirm that they see this on their iPhone?

 

[uberamd]

Negative on this end, no network activity in my Phone app.