I have a Curve 8330 and was wondering how do you attach a signature to text messages: SMS and MMS?
To add a signature do the following:
Go to Options>Owner.
Add what you want to display for your signature under Information
Press Menu key and Save
Now when you type a SMS or MMS message, as you get to the part of the message you want to enter your Signature information, type 'sig' (without the quote marks) and viola, the information appears without having to type all of it.
Doc
Excellent, Doc.
Let's keep in mind that any signature will count towards your 160 SMS limit.