So recently my friend was given an Iphone 5 from the Verizon network. (Her friend no longer needed it) and she asked me if it can be used on Virgin Mobile or Boost. Are Verizon Iphone 5's unlocked from factory? ( A few articles said they were) If not, can they be unlocked? (What is the process, I have never done this) Lastly, would it work for Virgin of Boost? Appreciate the assistance!