I was not eligible for an upgrade, buy my mom's line was. I used her upgrade to pre-order the iphone 4. When it arrives in the store, will they be able to switch it over to my phone without problems??? The receipt and online says that if it will be used for a different line, both phones need to be present in order to change the number. I don't live anywhere near my mom...does anyone know if they can change the iphone 4 to work with my number even if my mom is not present at the time??? Thanks in advance...