???Forty per cent of Vietnamese people use their smartphones to compare prices in store and online.Today, smartphones make it easy for shoppers to check prices and product reviews while they are in a store.Asia's shoppers are experts at showrooming.Many younger shoppers (aged 18-30) also use smartphones while shopping to compare prices and find the best dealsWhen you're in a store, do you use your smartphone to check online prices?The top showroomers are in Vietnam.???????????????????????????