same number or different number?
安装费 =One-Time Activating Charge?
if for same number, that fee is one time one, but for definate answer, you can call 1609 for Residential line
楼主应该是问再申请一个电话号码吧
如果是同一个号码，直接买个电话接上就行了。如果是再申请号码，打热线或到邮政局问一下，国内第二部电话有优惠，不知道新加坡怎样。
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