And other question is I installed a official Android 4.2.2 Samsung UK OS to my Galaxy S4 mini GT- I9195 Which made by samsung Vietnam. Now problem is I don't have 2G network mode in the OS. Only I have 3G and Auto modes. Can I get 2g mode again by installing a different kernal? Because one of my friends told me that not having 2g problem can be solved by installing a different kernal.. Or do i have to flash a Different OS again? please help me I've Downloaded a kernal already and i just need to know will it be okay by installing a kernal?