I was using RR ROM and now wanted to install KK 4.4. I tried installing them directly from RR Rom but it gets stuck in the SAMSUNG logo screen when it boots...I then tried installing the stock rom 4.2.2 ,but then again it gets stuck in the SAMSUNG logo and nothing happens! What could be the problem ? I tried installing another file of stock rom ,but it also gets stuck in the Samsung logo.Please help me :/ I want 4.4 badly !