Here's the scoop on Bluetooth/Assist TCUs that come in 2005 MY E46 cars with assist. There have been a few running changes:

84 11 6 946 993 - No voice command, phased out in 2/05
84 10 6 964 114 - Built-in voice command for phone, SW version: 25 HW version: 42, phased in 3/05, phased out 5/05
84 10 6 965 056 - Built-in voice command for phone, SW version: 27 HW version: 42, phased in 6/05

I'm not sure what the difference is between the 114 and the 056, but clearly the software has been updated. Both have the same feature set, incl voice command.