which one should i buy ?

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I would advice you choose the nexus 7 2012 tablet because unlike the dells 2gb ddr2 the nexus has 1gb ddr3 and quad core processor which would never freeze or lag up on you. The nexus 7 has the KitKat upgrade which will also improve performance unlike the dell tablet
I would advice you choose the nexus 7 2012 tablet because unlike the dells 2gb ddr2 the nexus has 1gb ddr3 and quad core processor which would never freeze or lag up on you. The nexus 7 has the KitKat upgrade which will also improve performance unlike the dell tablet
 
Solution


thats a pretty good point mate thanks i didn't notice it was ddr3 :)
 


does adding custom roms avoid warranty ?

also how to do it safely as i don't know how to do it or what are the reason people change roms