No need to cancel the first card. Just apply for a new one. I had an AS signature visa, and then signed up for another one a few months ago. Same mileage plan number as my first card. I got 20,000 miles in my account, and the $50 companion coupon as well. I did pay the annual fee. I called and cancelled the new card within a month or two of receipt, and asked that the credit limit on that card be consolidated with that of my older AS Visa. No problem.