T-Mobile in the US has updated the s6 and s6 Edge to Android 5.1.1. We call on Samsung to release it to the regions. We know that RAW and Pro modes have been added to camera firmware. Also other tweaks to system. However we are not sure if the RAM management bug had been rectified. The speculation is that it has not.
It all has to do with Google who provide the updated Android platform they send to OEM companies.