Samsung Within, rumored to be the Sprint version of the 1.2 GHz dual-core processor powered smartphone and has 4.27" Super AMOLED display, Samsung Galaxy S II.
Galaxy S II alias Sprint Within brings a bunch of high-end mobile hardware, including 1GB of RAM, 8 MP main camera with HD video captures, additional 2 MP secondary camera for video call, has a HDMI as well as DLNA support, Wi-Fi B, G and N connectivity, built in memory 32 GB and microSD slot for up to 32 GB of external storage etc.
However, Samsung Within - Galaxy S II Sprint version is not 4G device, it runs on CDMA1x and 3G EVDO Rev. A network and doesn't have WIMAX capability to run on Sprint's 4G service.
Still a rumor so far, no official word from Samsung or Sprint related to Samsung Within. The latest news will be updated as soon as there are any official statement. Stay tuned!