The second day I got my phone I downloaded ready battery saver or something like that and it permanently killed my data connection and I had to do a factory reset so I has to redo everything and I have not downloaded anything like that since. It's been a few months and people keep taking about juice defender because it turns off your data when your screen is off. Do you think it's safe to download or not. Honestly, I'm scared stiff of messing up my phone again, but I need my battery. Help me out?