I received an MMS on my mobile . I couldn't notice the MMS title or the sender number. I opened the MMS and nothing noticeable showed, and I just thought it was some advertisement MMS and I didn't care. But after an hour, I noticed that there was a missed call but I did not hear any ringtone. Then when I checked my Profile (to set the ringtone), I noticed that there is a new profile called: "Carkit". Due to this profile, I cannot hear any ringtone when a call comes nor cant hear the other person's voice when I get or make a call. The other person can hear me though. If I try to change the profile, a message like: "Pull out Carkit" will display. So I cannot change it now. Customer Care told me to take it to Service Center. If any have idea to solve problem please reply her