VOIP Audio Service (VAS) API 2.0 has been published for S60 5.0 devices. In 2-3 days Forum Nokia will publish it for S60 3.2 devices.
The interface is binary compatible, but the SIS file is preinstalled to the ROM in the S60 5.0 devices. For 3.2 devices, you would need to embed the VAS into your package and install it in addition to your application.
Initial comments say that voice quality has been improved thanks to new error concealment feature in VAS.
Any feedback would be great