Every once in a while I get a text message from someone, I go to Messages, I see the message, but I also get a dialog that says something about MMS and missing phone number (should have taken a screenshot), even though this is not an MMS message. In one case it was text message, in another case it was iMessage. Anyway, I dismiss the dialog and it takes me to Settings -> Phone and under phone number it says Unknown. So I enter my phone number there. And I check back later, it's still there. But then a few days later same thing happens and my phone number says unknown. I don't know what is causing my phone number to disappear.
1. Why would my phone number get wiped out?
2. Would this cause any problem? Why do you need to set your phone number anyway?
1. Why would my phone number get wiped out?
2. Would this cause any problem? Why do you need to set your phone number anyway?