朋友带裸机过来，请问如何买SIM卡打电话？钱怎么算？(不入计划得那种）
Maybe like this:
Singtel: $0.28/mins $0.10/sms
M1: $0.05/sms (1) $0.05/mins(超级非繁忙时段:21pm-09am and Sunday)
(2) $0.10/mins(非繁忙时段: 19-21pm)
(3) $0.20/mins(other)
Starhub: 接电话不需付费，好像是短信$0.10/sms,电话$0.20/mins（信号比较差）
大致是这样的，仅作参考...
M1: $0.05/sms (1) $0.05/mins(超级非繁忙时段:21pm-09am and Sunday)
(2) $0.10/mins(非繁忙时段: 19-21pm)
(3) $0.20/mins(other)
Starhub: 接电话不需付费，好像是短信$0.10/sms,电话$0.20/mins（信号比较差）
大致是这样的，仅作参考...
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