It works !!! I have the Galaxy Tab 3 10,1 and I tried it and it works... you just need to practice a bit... maybe a tad tricky to do but it takes about a second or two and the screen flicks a bit on the edge around which shows a screenshot has been taken... there is nothing wrong with your Tab... just take your time to practice and remember to briefly press power and home button simultaniously otherwise you will turn off the Tab like I did for my first couple of times... happy screenshoting ; )