我在flytalk上也问道类似信息了。多谢! I'm the plan owner and my wife is the second line, when selecting which account to upgrade the phone on, it goes by telephone number. I used my ATT Access card on my phone, and my wife used her ATT access card for her phone. I'm not sure if the T&C states the names must match but don't see it as an issue as long as you meet the requirements of the card