All Samsung firmware are not carrier specific. Now how your phone works with the firmware is totally unknown to me. Sprint is weird since it's a cdma network. If u were on a GSM network i would have said it's as easy as pie. But to answer your question yes, it's simple as pie to just download Odin and ari6, put your phone in download mode, load the files to Odin (if u want to retain your sprint software use HOME_CSC rather than CSC) then run the update files from there using adb sideload from the recovery menu