Jailbreaking is the process of removing the limitations put in place by a device’s manufacturer. It's allowing you to install third-party software from outside the app store.
Unlocking a phone allows you to use it with a different SIM card, either to use a different carrier while traveling or to take your current phone with you while switching to a new service provider.
To jailbreak your iPhone visit IphoneHacks.com
To unlock your iPhone visit Unlock-Zone.com here they unlock your iPhone using Remote unlocking method.