nothing, network speed varies, connection to a server varies, usually speed test sites have multiple servers in a location and bandwidth load varies. the only way you could possibly make way in getting better network speed is by hard modding the amount of power the antenna takes and its transfer rates, or and i've noted this with clocking OC ur phones processor, that doesn't make a GREAT change but it was noticeable from 245mhz to full stock 600mhz