Well, that didn't take long. Sprint may not have opened its own icebox just yet, but thanks to a BriefMobile source, Nexus S 4G owners can snag themselves Ice Cream Sandwich anyway. While there have been previous efforts, BriefMobile says the leak contains the full, official ICS update, which will be delivered to handsets OTA shortly. Of course, if you can't wait the site has full installation instructions. Hit the source link below to get started.