How do I find the main mobile phone distributor in Singapore? Thanks for those who give answers.?

I'm looking for main mobile phone distributor in Singapore, distribute different kind of brands with full range of products. Thanks.|||The 3 main ones are Singtel, Starhub and Mobile 1 (M1). They are all very competitive, so scout around and compare prices and freebies. Their locations are easily found in the phone book.