You will need some tools. Make sure you have a Phillips 1.5×45 screwdriver, a pincet, a hair drier and a suction cup. Also, a scraping tool of some sort is required. And the most important thing you need to accomplish this task is a steady hand and nerves of steel. No, you aren't dismantling a bomb so what's the worst that can happen?
The big problem is putting the phone back together. Remember, it does have that IP57 rating which means you will have to rebuild it to withstand water and dust. And by the way, if you have a part left over, you've made a mistake!
source: Rounded via GSMArena