I updated my iPhone 3GS to iOS4 gold master and now I have no MMS. The camera button does not appear in the Messages app. I restored the phone and MMS returned but as soon as I restore from my back up I loose it again. Most likely this is the result of having installed numorus carrier profiles when in 3.0. I would really like to fix this problem so I don't have to start from square one. My carrier profile is currently set to version 7.0. Any ideas?