First facts: Using Iphone 4, 5.0.1, verizon, I don't use icloud for anything right now. Prior to 5.0, obviously I always used my laptop and cable to backup everything. I sync it with windows contacts also, because I use that once in a while. I travel a lot, and acquire a lot of new phone numbers, and I want to know if I backed up to icloud while on the road, would it erase all of my numbers? What is considered the master list that gets mirrored? For example, when I sync with windows contacts, it takes the ones from my phone that aren't on the pc, and puts them on the pc. If I were to back up to icloud while on the road, and lets say I had new contacts in there, would it always take the new contacts and add them to icloud? If I had deleted contacts from my phone, and synced to icloud, would it remove those from the icloud side? Or would it add the missing ones back into the phone?