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No.
I have never seen a signature included with text messages.
You could use the text shortcut feature. Settings>General>Keyboard>Shortcut. Create one for your signature.
You could use the text shortcut feature. Settings>General>Keyboard>Shortcut. Create one for your signature.
It's never been a feature of ANY iPhone model (or any other cell phone I know of). Since texts are limited to 160 characters, why would you waste space with a signature when your identity is obvious from the CID of the message?
Don't hold your breath on this being "fixed" unless you have a CPR-rescue team nearby.
You do know that signatures are included in the email function, right?

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