updated 02:05 am EDT, Tue April 24, 2012
China, Belgium, Netherlands, Vietnam only
Updates for the Nokia Lumia 710 and Chinese market-specific 800c have been spotted on Navifirm, allowing upgrades to the variant of Windows Phone 7.5 (WP7.5) known as Tango. The upgrades are only currently available in China, Belgium, the Netherlands, and Vietnam.
The update adds internet sharing in addition to the Sportstracker, News, and Creative Studio applications. No announcement has been made in regards to availability in other countries including the US.