The replacement sensor comes with one of the sensor connectors covered with another plug. So if the connector doesn't want to fit, you can remove the outer connector adapter and then connect using the inner connector. Also, I installed this along with a new battery to fix the proximity sensor not working when making a call. Well, this didn't fix it either. So I suspect it's an OS issue, but I'm not about to upgrade a 7-year old phone. It is what it is!