On my other phone I used to have a tag line that would follow all the messages I would send but I don't know if there is an option for that on the INSTINCT. CAN ANYONE ASSIST???
As of right now there are no tag lines or signatures for text messages. Sorry. Maybe that will be apart of an update sometime in the future.
If you go under settings then general from there go to voicemail setting and click on from name. I put my name there instead of my number so it shows my name to everyone.
go under my contacts and in the my info section type whatever you want your tag line to be instead of your name.