Last week my Z3v died. Was deleting photos, took a break and when I came back, no buttons worked, phone was very hot and white LED was on. Left it and then it bricked. Sony and VZW offered ideas but nothing turned it on. Bought a used one because I love it. Old one got Lollipop 6 weeks ago, worked ok on 15 month old phone. Now VZW has offered Lollipop for the new phone. Do I dare accept or keep 4.4.4? Also, does Lollipop really degrade the music app sound? Ideas?