[ravelsnip]

I have got this info from another forum.

ITseems To unlock an iPhone 3Gs you need the NCK which is a unique 15 digit key. Those keys for unlocking are sitting on Apples servers and send to the iPhone via iTunes while the iPhone is connected to the Mac/PC.
Each iPhone has a unique HWID, NORID, CHIPID, (id's embedded in the iphone hardware/chips and unique to each phone), the NCK is only working with the one iPhone where the above are matching. The NCK does not unlock any other iPhone. the official unlock is usually done this way.
Trying to bruteforce the NCK would take years even on high-end computers (NCK Brute Force - The iPhone Wiki).
Trying to guess the NCK is limited aswell, After 5 or so unsuccessful attemts, the iPhone becomes permanently locked to the carrier - unless you're feeling really, really lucky.
Apple has HWID, NORID, CHIPID... of all iPhones sold in countries, where the iPhone has to be sold unlocked (About activating iPhone 3G with a wireless carrier). So once a phone of those is connected via iTunes, the apple servers check HWID, NORID, CHIPID and compare it to their database. If the matching iPhone is marked "factory unlocked" the Apple servers send the unique NCK for this iPhone."

IF this is the case, why can't this unlock be just like any other computer application unlock which uses server authentication.. Like exchange server for example.

[nachobel]

This is how an official unlock works. The reason it's hard/impossible to hack is because each key is different and only works with that particular phone. The NCKs - to my understanding - are not BASED ON the phone information, but they are PAIRED WITH the phone information. This means that there is no "code to break" or "key to crack".

[ravelsnip]

^^why not a software alternation to unlock this code? I mean once you enter the key it opens up a software or runs a series of scripts in order to unlock..Why can't this script be run alternatively?

[nachobel]

It doesn't run an "unlocking script", it merely opens up the phone for alternative carriers. I'm not sure of the exact method but it's likely akin to entering a password for an encrypted file, except where the information in the file is exceptionally specific.

Think of it this way - people have submitted their log files and baseband files and all that for their carrier unlocked (by Apple) phones, and it's been completely unhelpful since each one is specific to that phone, there's no "universal script".

[ravelsnip]

I guess its check mate then (

[nachobel]

[famleon69]

they are doing it in spain, are several sites that are selling the code, but the imei are only for european iphones, not at&T...sorry, actually the sites are in spanish so.. if you can understand spanish, try to look, why the people are not developing this for USA Phones???

[nachobel]

There is a chance that once you pay them money, you send them your IMEI, they submit it to Apple as an official carrier or something, and then it gets unlocked. It wouldn't work with a US phone though for obvious reasons.

It's not a matter of developing it, it's a matter of it being physically possible (AFAIK).

[ravelsnip]

^^Dude it is possible....why won't it be possible? how were other basebands unlocked previously then? AFAIK, there is not enough expertise or effort put in or a combination of both which is delaying us an unlock for the latest baseband.

[confucious]

If yu think it's possible then, by all means, try it.
Everyone else knows that it is as close to impossible as to be not worth wasting the effort on.

[ravelsnip]

Originally Posted by confucious

If yu think it's possible then, by all means, try it.
Everyone else knows that it is as close to impossible as to be not worth wasting the effort on.

Well Its really funny the way when you ask me to try it.

It is like a doctor telling an engineer why don't you try to operate one of my patients. My profession and yours presumably(guessing) is different. WE are not hackers/developers to know inside out about that whether it is possible or not. But basing on PREVIOUS facts ( previous unlocks/tweaks) I can certainly say it is not impossible Quite unlike how you say

[confucious]

Unlocking a baseband is not impossible - just very time consuming.
Spoofing a 'factory unlock' is.
the Dev Team are working on a more permanent type of unlock which is why they only spend time on every other BB.

[famleon69]

actually only works in europe is a different world and laws...

[nachobel]

The reason it works in Europe and HK and the other countries/places this works is because legally Apple has to provide unlocked phones to either people who request them or to sell them at all.

Here in America the laws are different so they do not have to do this and thus will not under any circumstance. You cannot simply travel to France or wherever or mail them your IMEI and be like "here, get my phone unlocked" because your IMEI might as well be WHATSUPILIVEINAMERICAAMERICAAMERICAUSAUSAUSA - Apple is not going to unlock it for you regardless of where the request comes from because you're on a phone sold in the US.

Now you could purchase a phone from one of these countries and then get it unlocked - actually that's what many people do (on eBay). They just end up paying more than double what everyone else pays for their phones.

Spoofing a factory unlock via software is extremely difficult because you quite literally have to input a unique to that device code that isn't generated using any specific features from that device, thus isn't reverse engineerable.

As for creating some "back door" where the phone THINKS it's factory unlocked but really isn't...well that would be suspiciously similar to the situation we're in today, where we have to watch what software gets upgraded on the phone or our current unlocking solution doesn't work.

I know the dev-team and possibly others are working on a low-level unlock that is, in theory, much harder to patch out than the current type of unlocks they're developing. But a software solution to finding a permanent unlock - a spoofed factory unlock that is immune to software updates - is neigh impossible.

Hope that helps clear things up a bit.