Can you unlock/jailbreak an iPhone 4 - OS 4.0.2?

[bob]

Thanks for the help

Either one jailbreak or unlock.

[scott]

Which one? They're two completely different things.

[tasteyy]

I will make it clear about Unlocking and Jailbreak the Phone...........


Understandable Definition of Jailbreak:
A hack that gains access to areas of the iPhone, iPod touch or iPad that users aren’t supposed to mess with. Typically, this is an immediate prelude to either installing cool programs, unlocking the handset for use with another cellular network, or both.
Through jailbreaking, you are able to add additional applications to your iDevice. It allows you to do so by adding an application called Cydia to your iDevice. It also allows modding (changing) of your iDevice application icons, wallpaper, dock, status bar, chat bubbles, weather backgrounds, keyboard….etc.
You can Jail break it here Idownloadblog.com


Unlocking:

Mobile Phone Unlocking

Unlocking a mobile phone is a procedure to remove any SIM/Network restrictions set on the phone by either the manufacturer of the phone or by the mobile phone's service provider. After unlocking a mobile phone, you can still use it with it's existing network or switch over to any other supported network.
Unlocking Benefits

a) Switch to any other network: Once you unlock your phone you can switch to any other network and use the same phone.
b) Cut roaming costs: With an unlocked phone, you can go to any country/state and save money by using a local network rather than paying high roaming costs to your home network.
c) Higher resale value: Unlocked mobile phones generally have a higher resale value than a locked phone.


To Unlock I-Phone 4 You can use the remote Unlock service,that is best than all other unlocking service,I got the remote unlock service from the site
Ihav.net and unlocked the Phone from Network lock,Remote unlock service is best than all other Unlocking service.