This is what I did on my 4s running iOS 8:
Go to: "Setting", then "Mail, Contacts, Calendars".
Scroll down to "Signature" and change if needed.
Also, "Setting", then "Mail, Contacts, Calendars" - Under Accounts: select one and under "POP Account Information" see what is under "Name" Change it to what you want to show.
To turn off Location - "Setting" then "Privacy" - "Location Services" scroll down to "Share My Location"
Also found that if you open Messages, select a name of someone to text to. In upper right corner select "Details". Under Location select "Send my Current Location" When it ask to Turn On Location Services select "Cancel".
Hope this makes sense and works.