No you don't need their email address, you can just send it to their mobile number. I believe by default iMessage is not turned on in iOS5, you may need to tell your friend to turn it on.
I have to text a few friends and ask then to turn it on.
No you don't need their email address, you can just send it to their mobile number. I believe by default iMessage is not turned on in iOS5, you may need to tell your friend to turn it on.
I have to text a few friends and ask then to turn it on.
Anyway, try to add e-mail address of your contacts, because time to time Messages can't identify just by phone number. I passed this issue and since I've added e-mail address to contacts it's just works. Miracles don't happen