Samsung fixes Galaxy S9 and S9+ call stability issues in latest update
It took Samsung a few weeks to acknowledge the problem and find a fix, but two updates are now available for the Galaxy S9 and S9+, which feature the following firmware numbers: G960FXXU1ARD4 and G965FXXU1ARD4.
Each of these updates weighs in at 150MB and have been specifically released to repair the call stability issues. In addition, Samsung has decided to improve the quality of Wallpaper while at it.
We're not entirely sure if the update fixes the annoying call issues, but let's hope it does. If own either of Samsung's flagships and did not receive the maintenance update, you can head to Settings / Software update and force pull it manually.