Google announced that it will sell a developer version of the Galaxy S4 for $649 starting on June 26. We know that it's only going to be available in the U.S. at first, but we didn't know that it was going to launch with support for Verizon and AT&T. The last developer device, the Nexus 4, supports AT&T and T-Mobile's data networks.
Samsung's website has been updated to reflect support for Verizon and AT&T, where the devices are listed as "Coming Soon! Samsung Galaxy S4 (Verizon)" and "Coming Soon! Samsung Galaxy S4 (AT&T)." The devices won't offer anything different on the hardware side, you're still getting a quad-core processor, a 5-inch 1080p HD display, 2GB of RAM and 16GB of expandable storage, but they will launch without Samsung's custom user interface. Instead, developers and Android enthusiasts alike can enjoy a completely naked version of Android 4.2.2 Jelly Bean.
Oddly, however, Samsung's site for the phones still advertise the Air View and Air Gesture applications, which we assume are only limited to the device with Samsung's custom software. Also, we assume that these will still be sold carrier unlocked and without any subsidy from AT&T or Verizon.