FREE Redbox Rental Code – Sign Up Now, Get It By TXT Next Week Quote : Score a free one-night rental next week! Text REDBOX to 727272 to get free rentals and exclusive deals. (Only available on participating carriers, message and data rates may apply, and you can always text STOP to quit.) 1. Text REDBOX to 727272. 2. Get the code (next week). 3. Text STOP to 727272.