USSD activator plugin for ‘Huawei 1550 modem’

Hi There,
I use monthly Internet package 1 GB for browsing and downloading.
So I need to count how many megabyte I use daily. So USSD is the best tool, which I used.
But today after opening modem software I cannot see it. So I reinstall it. But It not be show into the modem menu.
It has a trouble. Please fix my problem.
