I am looking at adding my hubby to my account as a second line. Does he need to come to the store with me, since it will be his phone? Or can i go by myself and get it all hooked up for him, while he is at work? Again he will be getting added to my account as a second line, would like to get it done ASAP but if he has to come with me, it'll be a bit beforw we can go together. Thank you for your help!