Telco providers Telstra Corp, CSL, SmarTone Telecommunications Holdings and Hutchison Telecommunications hold the rights to sell iPhone 4 in Hong Kong whereas Singtel, Starhub and M1 carry the device in Singapore.
iPhone 4 is retailing between US$642 and US$758. According to reports, people were paying in excess of US$3,000 for the handset in the grey market prior to its official launch.
In both Hong Kong and Singapore, telecom companies are offering the device for a minimum contract term of two-years.
The iPhone 4 has already been launched in almost all of the major markets around the world.
Tech savvy South Korea however is expecting its launch to be delayed for a further two months as it awaits approval from The Radio Research Agency, according to the Korea Communications Commission.
Apple's iPad launched to long queues of eager buyers in Hong Kong and Singapore a week ago, The device sold out within a matter of minutes.