Stock rom rooted freezes A LOT!

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http://forum.xda-developers.com – Hey guys I've been experiencing random freezes on my phone mainly while connected to the internet,the phone freezes and completely stops working, I can hit the home button infinite times that nothing happens, I can lock the screen but they I can not do anything, so I then have to press the power and lock key until it reboots! This has happened to me 4 times just today two times using the browser, 1 time using Opera Mini and 1 time on the XDA app! I have searched but what I found is people with the issue, no answers! I'm running the stock UK firmware flashed through odin the XXALE8, wit (HowTos)