To improve my iPhone 6 I prefer to be able to have text messaging signatures

i love my iPhone I have been buying the iPhone since the second version but the usage of it has not changed much to improve it the issues are allowing you to fall behind instead ahead the iPhone needs to be able to;

have text messaging signatures

speak to text Siri need to be able to delete edit or cancel text messages

the he map would be awesome if it could tell what the speed limits are