nokia6280 手機保密碼問題,,急!!

今日諗住換左張新sim卡黎用,,

我開左機之後佢要我輸入手機的保密碼,,

但係我唔記得左個保密碼,,而家唔知點算....(之前我應該改左個密碼)

當我換返張舊的sim卡,,佢又唔駛我輸入,,我想試下改密碼又唔得,,

佢都要我輸返入舊的保密碼....我撞左好多個都唔得....

又唔方便交比nokia到整,,聽講佢地都唔會解到,,

只會重新設定你部手機,,我想知點樣自己解到,,

我都試過想去返定,,但係咩都要我輸入保密碼,,

搞到而家用唔到張卡,,好煩~~