>>> so please advise me if any body can what is the model number for the officially unlock model for Australia because i'm planning to buy an Australia set sell in the forum. I have use all the resource i know and now in doubt to make my decision.. please help

>>>I have read the iphone buying guide and found out that below are the list that have officially unlock iphone

For your reference, the list of officially unlocked iPhone 3Gs are available from the following countries:
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Belgium, Czech Republic, Greece, Hong Kong, Italy, Luxembourg, Macau, New Zealand, Russia, Singapore, South Africa, Turkey.

>>>please note that Australia is not on the list BUT if continue to read the guide its say that

The easiest way to purchase an officially unlocked iPhone 3G from these countries are to look for them locally. Sellers can be found right here in the LYN Forum's Garage Sales section. There is of course a markup to the prices of these iPhones for the service of ease provided to you but it is no doubt the safest and quickest way to go about it. The markup prices are in most cases quite reasonable. It might also be useful for you to know that local sellers commonly get their stock from Singapore, Hong Kong, New Zealand and Australia.

>>>please note that the last country written is Australia and this shows in the guide in details

2) Australia

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Optus / Telstra / Vodafone: (credit: mangoman, NekoRacing)

Out of the box, Australian iPhone 3G units are locked by nature. However, the local network carrier provider can perform an authorised unlocking for a fee.

Apparently, Optus prepaid iPhones are extremely rare nowadays and to make things worse, Telstra does not sell them outright anymore. However, one can head to JB Hi Fi, Next Byte or Harvey Norman to purchase them. The downside to this is that the unlocking process will cost you approximately AUD150 per unit.

Another viable alternative is, to sign up a contract. Bear in mind that you will require a legitimate Australia resident to sign up a contract for you. Hence this is only useful if you do have acquaintances there. The cheapest way to go around this is to sign up for Optus 'yes' AUD19 Plan for a 12 month period contract and then subsequently cancel it. This plan also includes an AUD62 per month handset repayment fee. Hence a simple calculation will yield a total price of AUD972 ([19 + 62) x 12 months] for the 16GB unit, which fortunately includes a free unlocking service.

Optus based iPhone 3G units are not incurred any unlocking fees. You just have to ring up Optus and their customer support team will subsequently transfer you to an Apple representative. From there, you will proceed to provide Apple with your IMEI number and it will typically take up to 10 days to complete the unlock process.

Once it has been initiated, you should receive a notification text message as shown in the picture below:
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Step-by-step instructions to perform an authorised unlocking (using Optus as an example):

1) Sign up for a contract with Optus where a credit check will be conducted (applicable only to legitimate Australian residents)
2) Opt for the 12 months contract plan
3) Make at least one call using that very same iPhone with the provided Optus SIM card (enabling Optus to register your IMEI number on their database)
4) Call Optus to request for an unlock
5) A text will subsequently arrive, indicating that it has been successfully unlocked (this may take up to 10 days)
6) Restore using iTunes and test it with a SIM card from another network provider
7) If it fails, ring up Optus again. However if it does, proceed to next step.
8) Call Optus to cancel your contract and they will then bill everything in a single bill
9) Pay the bill and you're done.


>>>so i try to find our the official unlock model for Australia on the net and all i can find is the list below nothe Australia is not on the list


Important:

How to verify an iphone if it is factory unlocked or turbosim inside

go setting-->General-->About-->Model

Check the code with official unlocked list below

ITALY TIM
MB489T/A
MB496T/A
MB500T/A


HONG KONG 3
MB489ZP/A
MB496ZP/A
MB500ZP/A


NEW ZEALAND Vodafone
MB489X/A
MB496X/A
MB500X/A

Singapore
MB489ZA/A
MB496ZA/A
MB500ZA/A

CZECH
MB489CZ/A
MB496CZ/A
MB500CZ/A
MB490CZ/A
MB497CZ/A
MB501CZ/A

Greece
MB489GR/A
MB496GR/A
MB500GR/A

Luxemburg
MB489NF/A
MB496NF/A
MB500NF/A

Russia
MB489RS/A
MB496RS/A
MB500RS/A" T

South Africa
MB489SO/A
MB496SO/A
MB500SO/A


>>> so please advise me if any body can what is the model number for the officially unlock model for Australia because i'm planning to buy an Australia set sell in the forum. I have use all the resource i know and now in doubt to make my decision.. please help

Is this seller reputable?
Is he a regular seller in LYN?
How much and what model are you getting?
Does it come with a receipt?
Have you also considered purchasing a Singapore unit since I know for sure the unit comes with a receipt for you to compare.

If I don't reply you PM me incase I forget >.<