A leaked internal Sprint memo reveals that starting on 11/11/11 'all iPhone 4S devices will have the SIM locked'.
Sprintfeed notes that the memo goes on to state that "the locking occurs during the activation process and is invisible to the customer." Such statements suggest that Sprint's iPhone 4S variant does, or should we say did ship with an unlocked SIM. But all is not lost for you early adopters, it is clearly noted that this SIM lock update will not impact any iPhone 4S activated prior to 11/11/11.
Take a look at the screenshot below for more details...
Darn it! I missed it! I should've have pre-ordered the 4S before they even came out. Oh well, I guess I will just have to wait for some of the geniuses to figure out an unlock (if there ever will be). Hey you guys who are looking for ways to exploit the 4S, more power to you all and please bring us the good stuff! Ciao!