Devices are rarely released with their full potential realized. If this were the case, root access wouldn’t be required to fix many inherent device issues. Granted, most users likely would still seek superuser status because having root is fun. Thankfully over time, OEMs have at least thought to quell the biggest and worst bugs before releasing a device. Still, there always seems to be a little problem here and there that needs to be fixed. The Samsung Galaxy S III is no exception, as users have found that the brightness settings are a little quirky.
XDA Senior Member mattiadj has released a couple of fixes for the settings to make them a little more logical. The first is a custom fix by mattiadj, and the others are copycat settings from the Samsung Galaxy Note. Differences between the two aren’t much, as the custom settings are geared toward battery saving and the values keep the screen pretty dim at low levels. The Galaxy Note settings are brighter at low levels to, as mattiadj put it, make the SAMOLED look more brilliant.
The tweaks are easily flashed through any custom recovery. Two versions of each mod have been made: one for non-stock based ROMs and for stock based ROMs.