Hello, I have a Samsung Gusto 2 phone and I'm trying to order iphone 12 but I want to keep my old number. When I'm at the check out it asks me do I want to transfer my old number or get a new one but when i but in the information about my number it tells me I'm already a verizon customer and wont let me transfer it. My question is do I need to take a new number then call in to have you change it or do I need to have you do that when I'm ordering the new phone?