Almost any disco or mc plat or world will work in walmart and vise debits from that region too.But, my fav bin that I can get to swipe for 1-1.5 in damn near any store won't swipe for shit in walmart. Also,,never swipe the same dump twice at the same walmart,,,kills dump instantly. Another reason for low swipe amounts and poor card performace is using dumps from old dump bases,,once a base gets flagged,,your screwed.