The underside of my s2 is starting to detach, how can I replace it?

The underside of my s2 is starting to detach, how can I replace it? Hello, the underside of my s2 (where the model number is located) is starting to detach, i already asked samsung on instructions on what to do, and they told me to go to the nearest shop that can fix it, which is 3 hours away, how canni replace it, and where do i buy the equipment needed to do so?