Nokia Lumia Icon aka 929 and Nokia Lumia 822 sender unknown

I have a lumia icon aka 929 and my wife had an lumia 822. We both started having issues last week sometime in that neither of us can receive mms messages. We can send and receive normal texts and send mms pics in messages, but cannot receive them at all. I've tried playing with the apn and mms settings in access point to no avail. Please help?!