Questions About Verizon RHOD500

[rcooper_2000]

Ok I have I guess what Is the New Verizon RHOD500 I have a few questions For a noob here I like Modding my phone. OK sorry if this has been asked somewhere else

1. What is the Purpose of putting a different rom on the phone? and can the original be saved to replace so that if you had to send back.

2 how can i tell if it is unlocked? i do have a Sim card and have been able to do the ##778 and look at settings i was told that the Sim card was for storage. Or if i went over seas i t would switch to the Sim card. I think this is all the Stupid questions for now as iam interested in putting a rom on my phone. but would like step by step info so i dont brick it

Robert