For previous iPhones that I've purchased directly from Verizon, I've needed to enter my account zip code and last 4 of SSN for it properly activate when it's first turned on, whether a Verizon or other carrier SIM is inside the phone. After this first time, this information doesn't need to be entered ever again for that phone. I don't think this is needed for Verizon iPhones purchase directly from Apple.