Hyperixa

Hyperixa’s IPSW Firmware Signature Status Checker is also available for non-jailbroken devices.

Just this week, Hyperixa released a neat little app called IPSW that can be used

Hyperixa’s new IPSW app lets jailbreakers know which firmware is signed for their device

One thing that jailbreakers and those looking to jailbreak should pay close attention to is