If u lookin for Cdma then the Motorola Timesport from is for U.Cost around $188 for promotions.But 2yrs plan
As for DualBand i think Singtel And M1 O ya Starhub is also offering deals U cannot refuse.
Singtel is having their POD Promotions Plans for Handphone with prices ranging for 33 to 86 dollars for subscribers.
M1 is having also having their sales too.Starhub also
I think U have to either go down to their shops or their websites
Heres their websites:
Singtel:http://home.singtel.com
M1:http://www.m1.com.sg
Starhub:http://www.starhub.com.sg
------------------
Well U gotto do it
U gotto do it.