I upgraded my sony tipo dual to jellybean using cyangenmod 10 using this tutorial. I was able to do most of the things without any problems.
But after upgrade I am unable to connect to mobile network. Even unable to save APNs in the phone. I tried restore factory settings. I tired to set my network APN to default but am entirely unable to save my APNs (any APNs). I tried re-installing the whole process again. But nothing has helped yet.