ipswDownloader is a very handy tool that every Apple iDevices user must need in order to download the newly released iOS firmware with a single click. The tool catches good attention as it informs user weather their new downloaded firmware baseband is jailbreakable and unlock-able or not.
ipswDownloader is available for both Windows and Mac version which supports all Apple's iDevices like iPhone, iPod Touch, Apple TV 2G and iPad.
Once you downloaded the the application to you system, launch it and choose your Apple model and the firmware that you want to download. Then click on download and select the location to save your .ipsw file. The rest thing will do by application itself. The tool will not download any custom IPSWs or jailbreak-state firmware instead it will grab the original link of iPSWs file from Apple server.
Download ipswDownloader for Windows
Download ipswDownloader for Mac OS X