[Tip] Enable call waiting on Windows Phone 7

We don't know if this is just restricted to Telstra in Australia or all GSM WP7 devices, but evidently on at least some Windows Phone 7 devices, call waiting is not enabled. Odd, eh?
Over at Chris Walsh's blog, he demonstrates how to enable this seemingly important feature and it's far from difficult:
Just type *43# into the dialer, then press "Call"
Of course there is nothing unique about that code per se, as they are just part of the GSM feature codes which are universal. Anyone else confirm whether or not this is disabled on their WP7 device?
Source: Chris Walsh (blog)
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Daniel Rubino is the Editor-in-chief of Windows Central. He is also the head reviewer, podcast co-host, and analyst. He has been covering Microsoft since 2007 when this site was called WMExperts (and later Windows Phone Central). His interests include Windows, laptops, next-gen computing, and wearable tech. He has reviewed laptops for over 10 years and is particularly fond of 2-in-1 convertibles, Arm64 processors, new form factors, and thin-and-light PCs. Before all this tech stuff, he worked on a Ph.D. in linguistics, performed polysomnographs in NYC, and was a motion-picture operator for 17 years.