Released f0recast v1.4.2 for Windows & MAC Download
F0recast is a popular tool by iH8sn0w for jailbreak users,This tool let you know if your iOS devices can be tethered or untethered jailbreak.

According to iH8sn0w :
f0recast is a tool for Windows® that will check your iPods and iPhones to determine whether it is tethered, or unlockable (iPhone Only).
It is just a real simple app for users who are confused about their device being tethered or able to unlock.
It even tells iPhone user’s their Boot loader, so if you are an iPhone 3G user with the 5.8 Bootloader, it will notify you that you can downgrade your baseband if you wish to unlock.
The famous developper has released the latest version 1.4.2 for Windows and Mac