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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 > About device > Wireless & 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.

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up vote 2 down vote accepted

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.

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Thanks but how to check the firmware installed? – swetha Dec 20 '12 at 6:00
It will be hard to find out what is currently missing, and even harder how to fix that. I am not sure if you updated with the right 4.0.4 and how you rooted it / what that did. I would try and do the following, since you rooted it already: Re-Flash it with the stock firmware or Cyanogenmod to fix it. Make sure you have the right model number firmware/updates. – uncovery Dec 20 '12 at 6:44

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