I made a thread about this but no one posted.
Even if you switched on the phone.
1.If you switched on the phone, connect it to iTunes, and restore the iPhone
2. Once the download finishes (960mb) complete the restoration
3. Once it is complete turn off the phone right away
4. Call Verizon 1800-922-0204
5. Tell them that you got the iPhone 5 today under your name and you would like to switch it to the other line
6. They will go through the steps and it should work
I spoke to a man named Michael and he didn't even need the IMEI or SIM number. I am also able to keep my unlimited data