I have the Samsung Exhibit II which has bluetooth 3.0. The device I have is a handsfree car speaker thing, but it's 2.1. The phone WILL pair with the device, but as soon as the device is turned off, or I go out of range, it will not re-pair with the device unless I unpair the device and re-pair it every single time. I was using it with my Optimus V perfectly, never had a problem with it at all, paired automatically every single time. I looked up as much as I could on the problem but I'm not getting a solution, it just will not stay paired. I can't simply just click connect, it won't connect, I have to un-pair and re-pair it every single time. I made sure I deleted everything off the device so it would only be paired to this 1 phone. Any help would be awesome.