Hmm odd, but just a fact when you say full bars of 3g, the bars have nothing to do with the signal strength of your data connection. The bars are strictly for your call reception. There was a post on it not to long ago. Just thought I'd through that in here. Honesty don't know what's up with your data. And as for the back cover fix, I don't think that's his problem for I don't know who would sit around with there back cover off for 6 hours. And anything rooted/flashing rom related should probably be posted in the rooting/roming sub forum. Sorry couldn't be of any real help.