Can you have a cell phone area code from another state, without changing it to the new area's code?

Question

Let's say I'm in Chicago and I activate a Virgin Mobile phone under the area code 312. I move to San Francisco 2 days later. Am I allowed to use the area code 312 (Chicago area code) permanently in San Francisco (area code 415?) Do I have to change my number and area code? Thanks.

Answer 1

Yes you can kept the 312 number  but you probably what to make sure your not roaming.No you don't have to change your number or area code unless you want to or if your roaming you might what to change it or start meeting up there.