Try taking the SIM card out while the phone is on and replacing it and switching on and off Airplane Mode. It might be that a certain amount of time had to pass by before it worked. I'm not sure what the common thread is yet.
I am on a non-iPhone text plan, so that isn't my particular problem when it comes to restarting the phone and having no MMS again.
Yea.
Not sure what it is.
But mine was working. Then stopped. But working again.