block phone number when you send a text on, iPhone 4?
Go to settings and touch the settings key on your phone. Then, go to mails, show my ID and select the off option. You can also find more information on the same from this link www.apple.com/iphone.
You can try using http://goo.gl/IzmvwM.
Maybe this site can help you: http://goo.gl/sPClbz