Mobile network not displayed after I rooted my samsung galaxy 10.1 tablet I have a Samsung galaxy 10.1 tablet (GT-P7500) with android version 3.1.  

I upgraded the android to 4.0.4 (the latest one available). It was rooted but I guess I've modified something since it always used to show "permission denied" for superuser requests. 

So I rooted the tablet. When I did, the tablet didn't reboot by itself. Someone suggested that I wipe all data. So I did it and now the tablet reboots well, but it isn't showing the mobile networks options when I go to Settings &gt; About device &gt; Wireless &amp; Networks. 

I am not getting the 3G network either.

I want my tablet to get the mobile network again and I want to upgrade it to android version 4.0.4.
There are two versions of the tablet, one with mobile network and one without. Make sure you have the right firmware installed so that you get the right options.