Download a specific iOS version for your device: 

Check to see if your device is jailbreakable:

Download specific jailbreak tools:

DiskAid, available for both Windows and Mac OS X, is an iPhone, iPod & iPad transfer tool. The free version includes the ability to transfer files from one’s computer to applications on their device, access the device’s file system (similar to SSH), and transfer photos from the camera roll to the computer. Registering DiskAid adds incredible functionality; transfer music and videos from the device directly into iTunes or into a folder on the computer as well as transfer SMS, contacts, voicemail, voice memos, and other data to the computer. Purchase DiskAid for $17.43USD (originally $24.90USD) by using the coupon code TECHGEEC012Q2 at checkout.

Cyberduck, available for both Windows and Mac OS X, is a free FTP, SFTP, WebDAV & cloud storage browser. With an easy to use interface, connect to your iPhone, iPod touch, or iPad via SSH in addition to FTP (File Transfer Protocol), SFTP (SSH Secure File Transfer), WebDAV (Web-based Distributed Authoring and Versioning), Amazon S3, Google Cloud Storage, Windows Azure, Rackspace Cloud Files, and even Google Docs.