Activating Call Forwarding With US Cellular James Updated April 18, 2018 17:48 Follow Please follow the interactive help guide to help activate YouMail for US Cellular. Related articles Which Service Providers Are Supported by YouMail Drop Box? Why Is My YouMail Call Forwarding Not Working? Activating Call Forwarding With Straight Talk Welcome to the Knowledge Base! Comments 0 comments Please sign in to leave a comment.