I just received this phone as a replacement (from insurance) for my sony s710a and I could not be more disappointed with this phone.The phone would not pair up with my jabra bt250v which I could possibly live without however with the phone being in my pocket I was unable to hear it ringing with the volume on 5 (the loudest it would go, also there are no "profiles" to possibly make it louder) The actual sliding portion did feel like it "locked" into place however the top portion of the phone felt very wobbly and cheap. The phone has no flash and you have to adjust the brightness for every photo which makes it useless if your kids are doing something that is a "kodak-moment". I didn't find the phone to be user-friendly out of the box, for instance factory default is when you dial a number and close the slide it hangs up the call. this can be disabled but it was a shocker the first time.All in all, go with the w600i sony phone (that's what the insurance company is going to be sending me as yet another replacement)