It seems as though at least one smartphone manufacturer is finding some success with the Windows Phone platform, with HTC Singapore manager Melvin Chua stating today at the Singapore Mango launch that 30% of their unit sales are made up from their Windows Phones. It is unclear whether he is just referring to Singapore or globally, but this is certainly good news.

He further goes on to mention that “we believe that Windows Phone 7 will eventually be better than other platforms and will give Android a run for its money” – a bold statement considering the low (<5%) market share of the platform at the current stage compared to Android (>50%). He also mentions that Windows Phone has one of the fastest growing mobile app marketplaces, and that the “growth momentum of Marketplace [will be] stronger with the launch of Windows Phone 7.5.”

HTC is soon planning to launch two brand new Windows Phone 7.5 “Mango” handsets into the wild: the HTC Titan and HTC Radar. These new smartphones will add to HTC’s growing portfolio of Windows Phone devices, which already sees five devices being sold worldwide. Windows Phone will also grow as a platform later in the year as Nokia comes closer to releasing their first of many WP7-powered devices.

Also as a reminder to anyone using a HTC Windows Phone, the WP7.5 Mango update should be available right now for all devices worldwide, so check your phone for an update if you have not done so already.

Thanks to Razorfold for the tip!