Paired my cell phone multiple times and my Subaru Bluetooth keeps on disconnecting during a call. Very disconcerting. Support at dealer tells me to disconnect and repair phone. This solution does not work. 2015 Legacy Ltd. Not acceptable. Anyone know of patch of fix...

Maybe try another phone and see if the problem also occurs with that phone. If it does it could just be a firmware issue with your phone. 

If it still happens its probably a problem with the firmware in the head unit, which you'll likely have to wait until Subaru issues an update.