Please find the icon characters of CA service management mobility app as was circled in red color below. Actually they have no meaning (<, @, #, 4, ?, =, and $) to guide mobility users to know available actions for each button. Kindly, let me know this problem was caused from user front end (user mobile) or from server back end (mobility app. server) in order to fix it.
Unfortunately this problem was discovered as an issue on newer Android flavors (mostly the Android system webview component, which brought in some changes to the skins).
This is in the plans to be corrected in the next release of the app that is in the works.