1. Open the signature image and press and hold to bring up a dialog menu and choose copy.
2. Back at your home screen, find your “Settings” and tap on it.
3. In Settings scroll down until you see “Mail” and tap on it.
4. In the mail settings scroll to the bottom and find “Signature”.
5. Press and hold the empty Signature field to bring up the selection tool. Then choose “Paste”.
Your signature is saved automatically. You can back out of the signature screen and compose a new message to test your updated signature.