I finally had a chance to test the most recent rSAP module yesterday (thanks, Jaron).

Based on the info provided by the manufacturer it is a quad-band 2G and dual-band 3G module, so finally it covers the GSM bands used in the US/Canada. And yes, it connected to the AT&T network immediately with a full bar indicator using OEM GSM window antenna (huge thing).

Now, the best thing about this module comparing to prior rSAP modules (3C0, 5N0) is that this one actually works in both rSAP and HFP mode, so if your phone does not support rSAP (e.g. new iPhone 4) you can still use this module the same way as with 9W7 or 9W3 module. The difference is that in rSAP mode you can receive/read/write/send text messages.

The missing thing that I was not able to enable is A2DP, but I did not play with the coding too much.

Bad news is it does NOT work with RED MFA+ display (thank you, VW, I really appreciate it ). If you pair the phone with the module using a car with white MFA, you can still use the Voice Command button, but no Phone Menu on MFA.

The module has a mini USB port. Based on the info from the manufacturer it is used for the firmware update.