I have an Evo 4g flashed to metro pcs that won't notify me when I receive voicemails. I've tried rebooting a million times and have come to the conclusion that I have a software issue and need to root my phone to fix it (something about replacing a apk file, still learning). Anyway, I'm worried about rooting my phone because I don't want to lose my contacts, apps , ANYTHING, really, and I'm not sure what's saved on my phone and what's saved on my sd card, or how I should back up everything safely before I attempt to not brick my phone. How do I figure out what is where, and how can I save it all? First post ever, go easy please.