For the past week or so the phone will be fully charged and the next thing I know, I'll go to use the phone to check email or whatever and it freezes - the buttons (like home) won't click and the screen goes black and within seconds the 100% charged phone battery has drained. The little Apple symbol will show up and it will seem like it restarted itself but then when I go to open an app, any app, it freezes up again. I have to restart/reset the phone and I've updated it to the latest update but it keeps doing this. Right now I have it trying to do another update (I had just updated it a few days ago so I'm not sure if that one didn't take or if there really is a new update since then).
This certainly isn't normal behavior for an iPhone. Sorry that this has happened. Since it's been a few days since you posted this, it sounded like you were doing an update. Have things gotten better or are you still having the same issues?