jailbreak iPhone is complete once you ahve Cydia installed on the iphone. Now you can download whatever applications and tweaks you wish to. And you should remember not to upgrade your iphone immediately after an update is offered by ITunes.
In case you have an unlocked iphone, you should keep yourself away from the new iOS updates. You should be patient enough orwait for the jailbreak team to come in and use a jailbreak tool which is compatible enough to allow you to upgrade iOS and as well as jailbreak – both at the same time.
Apple iphone is a precious possession and every user would want to make the best use of jailbreaking it. Thus one needs to be sure to use the best solution and the best software for jailbreak iphone 4. One must be warned that there are many websites which are more of a scam and they sell junk software. Thus you need to be careful before you spend your time and money.