Since today i have receive the final pie for s9 uk btu neverlocked here is some problmes that i have seen: -when you try to connect to wifi 5ghz router (linksys wrt3200ac my model) from  10m from another room where the signal is like 2 lines it's stay a long time to connect...never happend on oreo os -did came back home with 10% battery shut down by itself ..strange .....i have turn it back on manually and still had 8 %...will test again ..but a lot of people are complaning proof : https://www.sammobile.com/2018/12/28/final-galaxy-s9-pie-update-possible-battery-drain-issue/ -when i started data mobile later in a lose signal even for gsm only restart fix -also adaptive birgthness is a mess not so responsive  -when you go to settings enter  connections lags most of the time when you haven't use your phone ....this never happend on oreo -also a problem with the wather app when you click refresh on the small cercle enterers the app not refresh ...another thing in the app when you drag to refresh not always works..did clear cache no fix -samsung internet 8.2.01.2..unable to check for updates . there is no network connection ...retry does not work..i have the latest version ....did clear cache and data no fix  -also when lock the phone some shadow it on the background is there...it fades away ...   we wait so much for this is not finished yet    did perfom wipe cache, full network reset , disable all power savings    what about you ?       ... View more