Once you accept the new update, the device can no longer be unlocked and rooted, on another note, my S3 was unlocked and rooted for over a year, I have played around with numerous different roms, and they all have issues, the most glaring one is bluetooth connection issues, and too many other problems to list, I ran the most recent CM 4.4 kitkat ROM and AOKP 4.4 both had issues that I could not live with on a day to day basis, I need my phone to work all the time. So I bid the rom community farewell and locked down my S3 and took the most recent update of stock 4.3, it's the best thing I ever did, everything works the way it should and the phone is smooth as butter. If you want a reliable working phone on a day to day basis, I suggest you stay with the stock RIM.
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