The name “Project J” was thrown around quite a bit with Samsung’s devices, and is now known to be the original codename of the Galaxy S 4. However, there were multiple variants of the Project J, such as the J Mini and J Activ. The J Activ seems to be a waterproof version of the S 4, known as the Galaxy S 4 Activ, which should be announced by the end of the month. The next logical assumption would be that the J Mini would be code for the Galaxy S 4 Mini, but the name “Serrano” has been tied to the Mini as well. The Serrano is coming to AT&T with the model number of SGH-1257, so it’s safe to assume this will be the Galaxy S 4 Mini. The Galaxy S 4 Activ will probably also land on AT&T, but no word yet.
Either way, these Project J variants are not expected to surpass the original Galaxy S 4 in any way— they are simply mid-range alternatives, with some slightly different features. We’ll keep you guys posted on these phone announcements expected later this month.