I know everything is about SYNC 3 these days but I bought a 15 with SYNC 2 that was stuck on 3.7 with no update avaible. I couldn't stream BT audio from either of my Android phones, only an iPhone. Opened a chat with Ford after reading about at least there being a ver 3.8 but the rep said it had been pulled and is now a dealer only upgrade but couldn't say wether it was free or not. I finially found a download of Gen2v38build15128updatepackageNARev1.zip and installed it. At first it was freezing but after a master reset it seems to be working fine for a couple days now and my Android issue is fixed. Since then I found the same file but it's rev2 and only slightly different in file size. Does anyone now either the latest SYNC 2 release (rev2?) or is it know what the difference is between rev1 to rev2? It seems stable now so I'm hesitant to flash unless I have a problem or someone knows what the difference is. TIA for any insight.