In Western countries, the use of pagers already goes back 30 years. But the concentration of use is nothing like in East Asian countries--like Korea, Hongkong, and Singapore--where they have become popular only in the last ten years or so.
在歐美等西方國家，呼叫器的使用已有卅多年歷史，但使用密度反而沒有最近十年間才開始流行的東亞地區﹘﹘如日、港、韓、星等地。