Register up to three eligible Visa cards with your MileagePlus membership and earn miles and offers via text message. Simply input your MileagePlus account number, Visa cards, and cell number and be alerted up to three offers per week when any of your linked cards are used. To qualify for the 500 bonus award miles, users must successfully register with the 3 previously mentioned items. Registration expires on October 21, 2012. Allow 6-8 weeks for 500 miles reward. Offer valid to all residents within the 50 states.