Summary of Terms: Message and Data Rates May Apply. You must be the account owner or have authorization of the account holder to subscribe. Subscription plans $9.99 per month for AT&T, Alltel, Sprint, Verizon Wireless, US Cellular, T-Mobile and CellularOne customers. By entering your cell phone number on the website, you consent to receive a text message containing a PIN code. By entering the PIN code back on this website, you acknowledge you are subscribing to The Grandprize.com service consisting of 30 guesses per day to be used towards eligible Grandprize.com Prizes and participation in a daily interactive trivia quiz club and that you will continue to be billed until you cancel the service. All customers will see the applicable charge on the monthly cell phone bills (or deducted from the prepaid balance if applicable) they receive from their applicable carrier. Grandprize.com subscribers may cancel by texting "STOP" to 41729. To get help send "HELP" to 41729 or contact Customer Care. Text messaging capability is required for all Grandprize.com subscription services. You must be at least eighteen (18) years old to use the services or the legal age of majority in your resident state, if different. All plans are subject to Grandprize.com's Terms & Conditions, available on our Website.