What is Cydia?
Cydia is a iPhone program via which you can download softwares on your Jailbroken iPhone 3G / 2G / 3Gs or iPod Touch running firmware 2.x / 3.0. A stock iPhone / iPod Touch can only download apps from the official Apple iTunes App Store; however Cydia being open source bring to you much more option. For users who have used Installer on iPhone 1.x; “Cydia is a v similar App”.
What is Jailbreak / Jailbroken iPhone?
“When you want to add ringtones, change wallpaper, or run third-party applications on your iPhone or iPod Touch, you need to perform a task called “jailbreaking”. What this does is to open up your iPhone’s file system so it can be accessed from your computer.”
How to install / get Cydia on iPhone or iPod Touch?
Yeah now you are talking business! Cydia and Installer get automatically installed when you JailBreak your iPhone. Just identify which firmware version you are running and look for a jailbreaking solution. Almost all versions of iPhone / iPod Touch can be jailbreaked.
How to Jailbreak my iPhone!!
Well Well! You will need to download several files and run a simple process to do this. A tool called QuickPwn is a simple GUI solution that works on PC. Listed below are the links for latest iPhone / iTouch Jailbreaks.
Update: Use the latest version of Redsn0w to Jailbreak and Ultrasn0w to unlock the iPhone OS 3.0 or earlier. Get them at the download page.
iPod touch 2G Jailbreak solutions – QuickFreedom & Dev Team Tool