Has anyone noticed this:

I've noticed that turning this on doesn't always seem to stick. I've turned it on, then found a had a voice mail (but no missed call, so the feature didn't work). I then tried *765, turned it back on. That was yesterday. This morning I thought I'd test things out and dialed *765 and sure enough it gave me the tones that it was just turned on.

What gives?

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Thanks
- Andrew - PDAPhoneHome.com