Tech blog Mashable is confirming that Jay Z and Kanye West will be kicking off Samsung’s four-day SXSW concert series that gets under way on Wednesday. Samsung will be giving out special concert wristbands to owners of Galaxy devices that have the new ad-free radio service Milk Music downloaded to their devices. Writsbands are available for pick up at the Galaxy Experience pop-up location at 2nd Street and Trinity Street starting Tuesday at 10 a.m. CT. Other musicians scheduled to perform include Janelle Monae and Gary Clark Jr.