Just incase you are wondering, the GT-I9500 is the Exynos Octa chipset and the GT-I9505 and SGH-I337M are of the Qualcomm Snapdragon 600 variety. As time progresses we are certain Samsung will get the kernel source up for the U.S devices and any other regional or national carrier across the globe. We do have to wonder though, how long will the Verizon version take to go live. They have never been very keen to the developer community.
If you are looking to get your coding fingers dirty, fire up that mega monster PC of your and head over to Samsung’s Open Source Center. Or you can go by specific model via the links below.
Kernel for GT-I9500
Kernel for GT-I9505
Kernel for SGH-I337M
Source: AndroidPolice