I used an iPhone for years and then switched to android recently and had a heck of a time getting messages from my contacts iPhones to reach me. There phones were trying to send imessages instead of SMS. Finally, i removed my number from my apple support profile and text the word STOP to 48369 per instructions I found online. SMS worked for the most part. Now, I went BACK to an older iPhone and when I am trying to use iMessage. I re-added my number to my apple profile. When I go into settings on my iphone under messages, then send and receive, it shows my email address and my phone number. I unselected my email but my phone number is grayed out and I can't select it. So it seems like I cannot send iMessages from my iPhone using my phone number. I do not want to use my email. Anyone know why my number would be grayed out?