Well I am using the 20/20...or Have Eye's ROM...forget exactly. If I got to settings ----> Personal ----> VC, the Enable box is not checked. So I check it to enable it. However, if I were to soft reset the phone (which sometimes happens cus the ROM does freeze occasionally), when I go back to settings and personal and VC, the box is not checked anymore. So I have to manually recheck the box. Not sure why that happens.