Samsung started rolling out the One UI 4.0 update to Galaxy Z Flip3 and Z Fold3 owners in South Korea a couple of days ago, but users are reporting a variety of issues with the new version. It seems that Samsung has temporarily pulled the update while it investigates the issues.
Said issues range from bricking the phone or sending it into recovery mode to reduced performance and screen flicker. Some users have also reported issues with the camera app and that the Dual Messenger feature isn’t working with some apps.
Samsung Galaxy Z Fold3 that went into recovery mode after trying to install the One UI 4.0 update
It is not clear when the update rollout will be resumed (or when it will be expanded to other countries). Samsung employees are talking to affected consumers to try and help them troubleshoot the issues.