Helppp!!!! Please

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http://androidforums.com – How can I tell if I am running ginger bread or a different system? How can I tell if my phone is rooted? I just had metro flash my phone from sprint to metro... Should I root? What are the benefits ? what are risks? Anything else I should do to my phone? I also have to types of messengers now..Metro messenger and my old standerd messenger.. I would like to keep my old messenger and do away with the other.. I still get messages in my old one but no notifications..The metro messenger sucks.. (General)