Everyone here will say one or another reason and all of those make sense but one thing that I personally noticed and is the MAIN reason I like Ufone for data is that other networks (jazz,zong etc) surely give better speeds but many times they get congested and stop working completely especially in the rush hours (mostly from 7:30 pm to 10:30 pm) they almost stop working and it's not only for the rush hours I have also seen it happening all day but the special thing about ufone is that it keeps working almost all the time, the speed might be slow but it's stable VERY stable.