You can add the CBS channel using the Roku Streamer Remote or you can perform it through PC or the Android devices. You need a valid Roku account and Roku device sync to it prior to adding the channel. For more assistance on CBS channel pre-activation Roku configuration procedures, you can visit www.cbs.com/roku. for more information call at +1-866-991-0490 or visit here https://www.gorokuwireless.com/cbs-com-roku-activate/