First you installed browser in tablets like opera is best. Then which types of network used, if you are used SIM support network then contact SIM phone company customer care, or if you are used direct network used then contact that customer care. Because If you are used in tablet, then your first tablet setting network. So Customer care provides step by step solution. Or If not support then contact network engineer.
In order to setup mobile network in Android tablet, you have to follow some instruction as mention below.
>> You have to put your SIM card in the mobile and turn ON your phone..
>> The phone will automatically detect the setting from the service provider network.
>> Then you have to go to setting.
>> Under setting section, you have to go to "Wireless Setting"
>> Now you have to select the mobile network.
>> Here you have to enable "data packet "option.
>> Save all the changes made.
>> You have successfully done!!