Almost every TV remote is held by latches. See if you find any screws, may be one or two in the battery compartment and after opening them just pull apart the remote from the middle.
Hey just joined to answer this question :D Hey sometimes Android firmwares give this problem and just reinstalling your phone's software fix it. Try reinstalling Android with Samsung kies. But if that doesn't solve it, it may be a problem with the hardware. My friend has the same problem and I fixed it with just a scavenger hack. Maybe your problem is different but I think you should give my hack a try. So here goes. The problem maybe with your button itself. I mean the very hardware itself, Samsung phones generally don't have this issue but Duos on the other hand was not that fortunate. So You may wanna show it to a local vendor if you are not sure about opening you phone and try it yourself. Ask the repair man to check and see if they can short the PCB connections of the button and get a response from it. If you do see a response from the phone then ask them to change the button and that will just magically solve the problem. If you want to open your phone itself then you can get that button out of an...
Wow! Someone really worked hard on this guide. Kudos sir.