I didn't use the HTC phone that you mention, but it would be interesting to know if the feature was implemented as well as it is in the iPhone. This feature has

I didn't use the HTC phone that you mention, but it would be interesting to know if the feature was implemented as well as it is in the iPhone. This feature has literally never failed for me in 2 years of using my iPhone (it sometimes gets false positives when the phone is in my hand, but it's not too bothersome).