Not entirely, I'll explain. One of my friends has recently moved from an iPhone 4 to a Galaxy S4 and kept the same phone number. Every time I go to text him my iPhone always tries to send via iMessage. I've edited his contact so that it's just listed as an ordinary mobile number and not iPhone but it still does it. Every time I have to tap the message and select "Send as text message". Does anyone know how to fix this?