5. in order to unlock your iPhone you will need to search for and download the following baseband bootloaders:
3.9 baseband bootloader
4.6 baseband bootloader
We took the liberty to find the basebands for you. You can find both baseband bootloaders on iPhoneFreakz.com.
Just scroll down to "Boot loaders"
Like the .ipsw file before, be sure to download the files without unzipping them.
Return to redsn0w and navigate to the .bin files you just downloaded.
To learn more about baseband bootloaders check out this forum posting on the Hackint0sh site.
6. Turn off your iPhone. If your iPhone isn't plugged into your Mac, plug it in first, then turn it off. Once your iPhone is off and plugged in, you can continue.
Hold down both as instructed by Redsn0w
Before you press next, prepare yourself. Redsn0w will ask you to place your iPhone in DFU mode. To ready yourself, grab your iPhone and place your fingers above the Top and Home button.
Press next.
Just follow the Redsn0w directions to put your iPhone in DFU mode and you'll be fine.
7. Once the iPhone boots into DFU mode, redsn0w will do its magic. You'll see a series of screens that inform you that Redsn0w is Uploading ramdisk, Uploading kernal, Rebooting and finally done.
While this is all happening, your iPhone will reboot a few times and run the BootNueter app. Do not interrupt this process.
Your iPhone will finally boot up normally and will be ready for a new SIM.
Unsure how to replace the SIM on your iPhone? Check out our how-to.
That's it. You are now the proud owner of an unlocked iPhone 2G. In order to keep your precious iPhone unlocked, check with the Dev-Team blog before updating the iPhone OS in the future. Some updates are fine, while others will restore your iPhone to it's locked status.
Pre-Paid T-Mobile
There are two major GSM carriers in the US, AT&T and T-Mobile. If you unlocked your iPhone to get away from AT&T, the choice is pretty simple.
We went to the mall and purchased a pre-paid T-Mobile SIM. You can sign up with a proper monthly based T-Mobile account with data and enjoy most of your iPhones features including an unlimited text and data plan for $19.95 per month. T-Mobile is surprisingly iPhone friendly here in the United States even though they don't offer the iPhone. A quick search on T-Mobile's site will show you how to set up internet and email on your iPhone.
Here are T-Mobile's settings for mobile internet on the iPhone:
1. On your iPhone navigate to Settings > General > Network > Cellular Data Network
2. Select the APN field, and enter internet2.voicestream.com.
3. Tap return.
4. In the Username field enter (this may be intentionally blank)
5. Tap return.
6. In the Password field enter (this may be intentionally blank)
If you plan on traveling, you can purchase pre-paid SIM cards from carriers all over the world. Suddenly, you're a just a little bit more international.
Our T-Mobile iPhone wasn't without issues. Check out what worked and what didn't.
What works -
iTunes syncing and installing apps - All of our apps still worked and iTunes recognized our unlocked iPhone without any problems.
Voicemail - When you receive a voicemail, you'll receive a red dot, not a number. But it works.
SMS - As long as you don't want to add Emoji or images, you're cool.
Find My iPhone -Locate your iPhone via the MobileMe feature.
What doesn't -
MMS - This has to do with Apple not placing adding MMS to the 2G iPhone version of iPhone OS 3.0.
Visual Voicemail - Even though T-Mobile is the official iPhone carrier in other parts of the world, don't expect Visual Voicemail to work here.
Emoji - You can't send or receive Emoji images via text message.
carlitallica
January 21, 2010 at 6:54am
Thank Your!!! it works perfectly fine no Sim Block now i am using it with the carrier here in Puerto Rico THank you Great Blog
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January 21, 2010 at 6:22am
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benet
November 10, 2009 at 8:14pm
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coldwire
September 14, 2009 at 9:20pm
NEED HELP - using an AT&T SIM from a non-iPhone device on a Jailbroken and Unlocked iPhone 2G, in the US. NO SERVICE displayed when the AT&T SIM that works on another phone, is used on the unlocked iPhone (unlocked using redsn0w 0.8). The AT&T SIM I am using is on a voice plan with data block active. AT&T coverage is better where I live and want to use my iPhone, without having to pay for data. Plan to use WI-FI for most data intensive needs in any case. Thank you.
onnie28
July 09, 2009 at 4:49pm
I click on the correct Torrent on their website (for the Mac) - when I clicked to open the torrent file in my downloads folder, I get a message that Safari can't open the file b/c no available application can open it. Any help would be appreciated!
jcollineal
July 07, 2009 at 5:38am
new to all of this...why would you want to unlock your Iphone...I know mine is a old one and I need to upgrade..but it still works great.
AlbinoAsian
July 05, 2009 at 7:43pm
Hi I currently have an unlocked & jailbroken 2g running OS 2.1
I have looked at your instructions and they seem really straightforward.
I have one question before I try to update to OS 3.Do I have to have an AT&T sim card in the device while doing this process. I do not have an AT&T sim, nor can I get one where I live.
Am I able to do achieve an update, and then unlock it. Or will it require me to insert an AT&T sim in order to unlock the device.Thank you
trapi
July 06, 2009 at 6:14am
there is no need for an AT+T card. If your computer is a mac you can also use the pwnage tool which gives you more settings. With the 2g there is nothing you can do wrong. :)
AlbinoAsian
July 07, 2009 at 1:57am
I'm not sure why, after getting the iphone into DFU mode, Redsn0w would go no further than the first waiting for the device to reboot screen. Running XP in safe mode fixed that... maybe others using XP might want to try the same =)
trapi
July 05, 2009 at 11:50am
MMS works perfectly with the 2G. You just have to install a custom carrier bundle through cydia. It will activate the factory mms in the os. Apple just wants you to switch to something newer and wants you to have more reasons to do so. :)
You just have to have MMS support from your carrier, which is a given in Europe.
GrendelKhan
July 01, 2009 at 7:47pm
Pwnage is easier to use. Here's another set of instructions that works out a little easier (yeah, I jaibroke it as the same time).
http://www.modmyi.com/forums/iphone-news/635761-how-jailbreak-unlock-activate-iphone-2g-3-0-firmware-pwnagetool.html
