MCDVoice - Buy One Get One Any Sandwich: McDonald's uses the moniker "MCDVoice" to conduct Customer Satisfaction surveys. Customers who would like to enter a monthly sweepstakes may do so by completing the survey on the official website at www.McDvoice.com. Customers that completed the survey could receive a Sandwich (Buy 1, Get 1) as a bonus. Customers who completed the McDonald Survey are qualified to win meals in each case. Customers that would like to increase their chances of winning free sandwiches each month can enter the monthly sweepstakes easily thanks to MCDVoice. The MCDVoice Survey is set up such that, in just seven days, even a child can visit www.mcdvoice.com. https://mcdvoice.support/