Just to let you guys know, the GSM SGP Neo Hybrid II EX works well with the iPhone 4S, I received it today due to an error by Citi Electronics on Amazon, I was suppose to receive the CDMA SGP Neo Hybrid EX case but they sent me the II by accident and didn't want to go through the return/exchange process so I tried it on my iPhone 4S and it fits without any case interference with mute button, it sits lower than usual but doesn't interfere at all and if it did, it would rub only against the rubber part of the case, not the plastic part that may scratch the bezel. Just thought I'd share that with you all! 🙂