Yuzi download

Is there a way I can update my Motorola droid turbo 2s A2DP to send metadata and AVRCP from 1.3 to 1.4, 1.5 or 1.6? And if not does anyone know if there is a way to update my Rosen entertainment systems A2DP to show metadata when connected to my droid turbo 2. Currently apple iPod and iPhones my friends have show all metadata on the entertainment system so whats the deal with Androids 6.0 not working? And is there a fix?

Im in an area that has band 12 hot, and in most times its a stronger signal then band 4. Im using LTE discovery to search the signal. I can reset the radio with discovery and it comes back connected to band 12 but within a min it switches back to band 4. Is there any way to make band 12 the default band or force band 12 only? Im thinking not but wanted to make sure I wasnt missing something.