Budget Roaming with Sunpage

I found a service provider that offers budget roaming.
http://www.sunpage.com.sg/Default.aspx?tabid=73

WEBPAGE
Save while you roam… with SunPage Budget Roaming

Now you can enjoy Huge Roaming Savings up to 90% with SunPage BUDGET ROAMING, a mobile call diverting service.

All you need is an overseas mobile or fixed line number where you can divert your Singapore mobile number to receive incoming calls.