Lower-mid-range phones these days are becoming virtually indistinguishable from expensive, high-end mobile phones. Oppo has been consistently pumping out smartphones, focused on two segments – a high-end low cost, and the other a slightly entry-level segment with models looking far superior than they actually are. The Oppo A57, with a price tag of $328 fell in that segment. Oppo’s A77 is an upgrade from the pretty impressive A57.