Samsung Galaxy S9 has received an update. Weighing in at 696.28MB, the update brings the June 1st Android security update and some bug fixes to the handset. The new software version is G960U1UES2ARF4. The Verizon and T-Mobile variants of the phone also have received the same update.
If you do own the U.S. unlocked Galaxy S9 and you receive the notification that the update is ready to be downloaded and installed, you need to do a couple of things first before starting the updating process. One, make sure that you are on a Wi-Fi network. Two, charge up the battery on your handset to 100%. Once both of these things have been taken care of, you can then proceed with the update.
Since the update is being disseminated OTA, it will be going out in waves. That means that it might not hit your phone right away. Be patient, and soon you will receive the notification that it has landed on your handset. However, if you feel like you can't wait, you can try to manually coax it out by going to Settings>System on the phone.