We have been asked a lot of times about when the iPhone Dev team will release an unlock solution for iPhone 4 (with baseband 02.10.01 / 03.10.01). Here is a bad news. Recently, a core member of iPhone Dev team @musclenerd mentioned on Twitter that it took much longer than expected to develop the unlock solution for iPhone 4.
It’s sad to hear the news, especially for those who are desperately waiting for the unlock. The good news however is the team doesn’t give up yet and is making progress to come with a new permanent unlock solution called the “NCK”. Here is a complete FAQ courtesy of @veeence about the unlock status and the potential unlock solution:
Since there is a lot of confusion out there, and since I’m repeating myself all the time (which I do not really like), I made this little write up of questions that are continuously being asked (my personal FAQ). Please not that this is a global explanation. Don’t try to argue with me on specific details.
1. What happened?! I thought the unlock for basebands 02.10.01 & 03.10.01 would be released within the next 2 weeks?
As you know the Dev-Team (MuscleNerd) have been working on the unlock for quite a while now. They were making great progress on the unlock, but they found out that they (accidentally) unlocked “one particular SIM card” instead of the baseband itself. Which means that the unlock would only be an unlock you could use with MuscleNerd’s T-Mobile SIM. So, useless. If the unlock would unlock the baseband instead of “the SIM”, it’d probably be out within 2 weeks (reasonable timeframe which they had hoped). But things turned out to be different. Basically these <2 weeks predictions were a lack of information.
2. What is this NCK-key cracking? How does it work?
The NCK-key is the key generated by Apple if you’d officially unlock you iPhone, and with officially I mean, via your carrier. This “NCK-unlock” method is known over a few years now, actually since geohot started working on unlocking the iPhone 2G. He developed a program that could “crack” this 15 digits long key and unique for every device. Geohots NCKBF program could do around 100,000 keys/second which would produce a hit in many years, or complete a search in 317 years. To get to a point where this is actually doable we would need many orders of magnitude of improvement. Even if you use a PS3 (would we still want to use this??) or special hardware (within 1,000 US$ range) you will only get an improvement of 20-100 times.. which doesn’t help much.
Now, luckily, with the exploits they have now, they can’t unlock your baseband, but they *can* capture more information from the baseband to speed up this cracking process. Since the NORID and CHIPID (unique for every device) are known, you’d apparently only have to check 40 more bits (5 digits). A 40 bits key is theoretically crackable on “home hardware” within a week (24/7). The downside of this approach is that you’ll have to keep your computer turned on, and your iPhone has to be connected. And that is the reason why they never tried it before. Please note that this method is completely theorical and has been NOT tried at all till this moment.
3. Now what? Should I sell my locked iPhone 4?
I’d wait for more information on this “NCK-unlock”. Right now it’s pretty vague what timeframe we’re talking about. If the Dev-Team can pull this method off, it’d be very promising for those waiting for an unlock. If this method turns out to be not doable, I’d consider selling your iPhone 4 and save up for a factory unlocked iPhone 5.
4. Do you think there is every going to be an unlock?
Of course. But that’s unlikely to be any time soon (with soon being <1 month).
5. If the NCK method fails, how long do you think it will take for the Dev-Team to unlock the iPhone 4?
No ETA at all. Could be a few weeks, but it could easily be a few months as well.
As of now, if you’re using baseband 01.59.00, please DO NOT UPGRADE your iOS if you depend on ultrasn0w unlock. The current version of ultrasn0w can only unlock this baseband version for iPhone 4. Stick with it, otherwise, you’ll lose the unlock and won’t be able to make/receive calls.
For those with newer version of baseband (i.e. 02.10.01 / 03.10.01), there is not much you can do right now (the only solution is probably to get an official SIM). There is no planned release date for the unlock solution. It may take weeks or even months until the release is available. Anyhow, we’ll keep you update about the unlock status. Stay tuned.