execute ussd from shell-script

Every month I need to execute USSD-command. I want to automatize it. My idea is to write shell-script for SManager . I found two ways to make a call (tested from adb): service call phone 2 s16 '*100#' and am start -a android.intent.action.CALL -d tel:*100# But this commands **call** to *100# instead of execute ussd. My Android is 4.2.2, rooted Cyanogen 10.1.3