Nothing more really...OM is just goofy that way and always has been, for some users.
What HAS worked in the past is, to set your APN/TCP settings correctly for your carrier, and save. OM is installed. Do a powered on battery pull reboot... and then...
Just wait. It could be a day or three, and it might start working. The fact that it can be a delayed fix has been mentioned here in the forums numerous times.