Jailbreak iPhone, iPod Touch, iPad

These are instructions on how to jailbreak your iPhone 3GS (all bootroms) and iPhone 4 using Limera1n for Windows. Limera1n supports iOS 4.0, iOS 4.0.1, iOS 4.0.2 and iOS 4.1.

Remember: Do not update to iOS 4.1 if you need the unlock. Ultrasn0w does not support that baseband yet.

Step 1
Download LimeRa1n here. If you have problems downloading go directly to www.limera1n.com and use link at the bottom of the screen.

When prompted save the download to your desktop

Step 2
Double click the limera1n.exe file from the desktop to launch the application

Step 3
Click the large make it ra1n button

Step 4
You iPhone will now be placed in recovery mode.

Follow instructions:

Press both the power and the home buttons.

When Limera1n asks you to, release the power button.

Your phone will now be in DFU mode

As limera1n performs its exploit you will see the image of a lime raindrop on your iPhone.

Limera1n will let you know when it is complete.

Step 5
After you power back on your iPhone you will see a new icon on the SpringBoard entitled limera1n. Press it to continue.

Step 6
Once Limera1n opens select Cydia then press the Install button at the top right of the screen.

Step 7
Once the Cydia installation has completed you must reboot your iPhone.

Step 8
When your iPhone has restarted you can run Cydia. Let it do all the necessary updates

NOTE*: To remove the limera1n icon from your desktop you can install CyDelete from Cydia then use it to delete the application as you delete regular AppStore apps.

UPdate: To have access to the root file system of your iPhone (via file managers like iFunBox) install application called afc2add in Cydia.

Having problems activating your iPhone? Don’t have original SIM-card? Cannot get passed emergency unlock screen? We have a solution:

If you have iPhone 3G, just use redsn0w to jailbreak and hactivate. If you have iPhone 3GS or iPhone 4 follow these instructions:

If you are already Jailbroken:

So you have an iPhone with iOS 4.0, but don’t have the original SIM and stuck on the Emergency Call Screen:

1. Download ifunbox software (download link)
2. Run ifunbox software and sync with phone
3. Go to /private/var/root/Library/, delete original lockdown folder and put this lockdown folder after you extract it from the zip file
4. Restart phone

If you are not jailbroken

Sherif Hashim discovered that you can activate your iPhone 4, iPhone 3GS or even iPhone 3G without the original carrier SIM card. You need a “phonebook sim card” or 02 simcard. You can buy these type of sim at radioshack, bestbuy or other mobile electronics store (for example here).

Once you get passed the Emergency Call screen, connect to Wifi, jailbreak using JailbreakMe.com and unlock using ultrasn0w. Once that is complete you should be passed activation and unlocked (able to use any sim). If you get a different simcard error, do the following final step:

1. Download ifunbox software (download link)
2. Run ifunbox software and sync with phone
3. Go to /private/var/root/Library/, delete original lockdown folder and put this lockdown folder after you extract it from the zip file
4. Restart phone

If you have itunes invalid response problem:

1. Connect to wifi and ssh to your phone (via winscp, putty, terminal, etc).
2. Navigate to your lockdown folder (/private/var/root/Library/).
3. Delete pair_records folder
4. Reconnect the cable and see that your invalid response problem is gone.

If you bought your iPhone 4 on ebay you will need the official sim (at&t) or a universal sim, like ones you can grab at bestbuy for $10 this will get you passed Emergency Screen.

via jailbreakmatrix and gsmhosting

Limitations:
Uploading music and movie to iPhone is now disabled on devices with firmware 2.x.