I have a galaxy s3 and I am trying to set up a contact with custom ringtone. I have been able to do so with all my other contacts except one. I am a volunteer firefighter and receive text message from our dispatch center when we get a call as well as tone out on my one way pager. The text msg I receive doesn't come from a phone number rather a email address. when I try and set up the contact I cant customize the ring for when I get text. any help would be appreciated.