If you added several email accounts on your phone, you need to change the signature in each account. 
	 
 
  
	 - From the 
				Home screen, tap 
				 , and then find and tap 
				Mail. , and then find and tap 
				Mail.
- 
		Swipe right from the left edge of the screen to open the slideout menu, and then tap an email account. 
		
- 
		Tap 
		  . 
		
- 
		Enter the text you want to use as your signature, and then tap 
		  Save.