Note: This guide is for iPhone 4
running iOS 3.1.3 to 4.0. If you
are
running iOS version later than
4.0.
This guide is not recommended
for
you.
The credit for this unlock
solution for
iPhone 4 goes to iPhone Dev
Team.
Without engaging you in more
details,
I ’d guide you through 10 steps
to
unlock your iPhone 4. It
shouldn ’t take
you more than 5 minutes.
Let ’s start:
Step 1. Connect your iPhone 4
to a wi-fi
network. No 3G please.
Step 2. Open the Safari browser
on your
iPhone 4.
Step 3. Go to Jailbreakme.com
and
jailbreak your iPhone 4. Make
sure

Remove Device
If you’re no longer using an iPhone, iPad, or iPod touch that was set up to use Find My iPhone, you can remove it from Find My iPhone when the device is offline (turned off or not connected to a data network, such as EDGE, 3G, or Wi-Fi). To remove the device, you need to sign in to me.com on a computer.

To remove your device from Find My iPhone:
On a computer, sign in to MobileMe Find My iPhone at me.com/find using your Apple ID email address and password.
If you’re a paid subscriber, your Apple ID is your MobileMe email address (@me.com or @mac.com) and password.

Do you want to get the iPhone 3GS for the cheapest price offered from AT&T well how does 49 dollars sound to you. Yes I know you still have to get a two year contract and everything and you won't have unlimited data but this is a great deal on a last generation phone if you are considering buying an iPhone 4 this is a viable option to that.