 On January 30, 2008, firmware update 3.90 was released which enabled Skype WiFi phone function on the Slim & Lite model, Brite model, and the PSP Go.Some titles for the PSP support a feature dubbed "gamesharing," which facilitates a limited set of multiplayer features between two PSPs with only one copy of the game UMD.A reduced version of the game being shared is transferred to the PSP without a UMD via the PSP's Wi-Fi connection, whereupon it is loaded into RAM and runs.