英國手機號碼開頭為什麼有一個零？
英國手機號碼開頭的零是國內中繼前綴，表示撥打的是英國國內的電話。在英國國內撥打該號碼時，應包括前導零，但從國外撥打時，前導零應替換為國家的國際撥號碼，即英國的國際撥號碼為+44。
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The zero at the beginning of a UK mobile number is the national trunk prefix. It indicates that the call is a national call within the UK. When dialing the number within the UK, the zero should be included, but when calling from outside the country, the zero should be replaced by the country’s international dialing code, which is +44 for the UK.
