I have no reason to have the cell network on when i'm sleeping, so that's why I disable it. And I usually go several hours at a time between looking at my phone, so disabling data works well. I know it doesn't work for all, but it works for me.yup, airplane mode and data off...that would definitely do it.
what rom/kernal u running?
I'm running BAMF 1.7 Remix with stock kernel @ ~1GHz