Hello. My phone is Sony Xperia Z3 . It's version is Android 4.4.4. Nope, it's not rooted. The problem is, when I try to install games with .obb files, the games crash and send me back to home screen . Yes, I placed the files in Android/obb/ but they just don't work. The games I tried to install are Grand Theft Auto: San Andreas, Grand Theft Auto: Vice City and Gangstar Vegas . Please help me.