SMS Signature is a new application available for jailbroken iPhones that will allow you to, as you probably figured out, add a custom signature to text messages sent from your iPhone.

After downloading the application from Cydia, you can use the Settings app to configure SMS Signature. From there, you can create and activate a custom text signature. From now on, every time you send a text message, the signature will automatically be appended to it…

I fail to see why would anyone add a signature to a text message. My mother in law does so and her signature says “Mom or Penny” so I guess there is a market for that.

SMS Signature is free in Cydia. You will have to jailbreak your iPhone first before using the app.

Would you have any use for this app?