I have an iPhone 3GS that I will be bringing with me from Oz (it's unlocked).

Currently in Oz, I have an unlimited call plan (I pay a set amount each month and then I use the phone for International calls, SMS, Msg Retrieval, MMS at an unlimited amount all included in the monthly plan cost. It also gives me 6GB of data for email and internet useage.

I am pretty useless when it comes to technology and analysing new plans (just not one of my forte's.

Are there any similar plans in HK? I'm having difficulty understanding how the mobile plans work in HK.

Also, I am wanting to keep my Oz number, but don't want to pay the roaming costs associated with the network here. Does anyone have any idea of companies that bridge that gap and offer much cheaper rates for call retrievals?

Hope that made sense.