I've noticed that my battery drains significantly faster since I upgraded. I listen to a lot of music on it at work during the day. By the end of the work day before the upgrade I might be down to 75% of the battery. Today it was down to 22%. This is all music I have stored on the phone, nothing streaming. Anyone else having this issue? I just did some reading up on it and disabled a couple things, so I'm hoping that will help.