“Samsung Gear s Wearable technology Is there a difference between the Samsung Gear S 40mm urethane, Samsung Gear S SM-670p, and the Samsung Gear S R750? If so what are they. I am trying to purchase an unlocked Samsung Gear S smart watch that i can utilize with my smart phone ( android samsung galaxy 5s note4). I would like to purchase an unlocked smart watch or one that's GSM arena functions with my sprint carrier. Would you happen to know the differences between those three Gear S smart watches? Are any of them able to function with my carrier ( sprint)? Any ideas on which stores or retail partnerships that are local to the 92395 area code ?”