your issue is a know issue with the iPhone,
there are 2 Uconnect SW updates and they need to be done in order. This update for this thread is #2.
The 1st update can be found in the link below, do it first, then for better sound quality, perform the update in this thread.
Originally Posted by Connman67
I tried the update, after two minutes, it said the used archive is not compatible with this unit. I have the RHB unit.
I did play with the bluetooth after this attempt, here is the issue. I get the skipping sound and fast forward sound BUT.... once the iphone screen goes black, (takes about a minute for my phone) the streaming works well. When i push the iphone button, blue tooth sounds like crap again, i leave the phone alone till it goes to sleep and the streaming sounds great again! I can live with this but would like to get it to work perfect. Just thought id share with others, you may want to try it to see if this is the case for you too.