An error on One UI 9 may prevent the Galaxy S26 Ultra from completing setup after a factory reset. Samsung has not yet announced a fix date.

Samsung started releasing One UI 9 for the Galaxy S26 Ultra from mid-September. However, this update is said to cause a serious error, causing some devices to be unable to complete the setup process after restoring factory settings.

According to feedback on the Samsung Community forum, the error may cause the phone to fail to connect to Samsung servers during setup. A Samsung employee also confirmed this problem.

Samsung recommends users switch from mobile networks to Wi-Fi, then log out of their Samsung accounts and try setting up again. If the problem cannot be resolved, users can log in to their account on the Samsung Account website using another device and accept the latest terms of use.

In case the above methods do not work, users need to contact Samsung support. Currently, the company has not confirmed the time of error correction, the correct firmware version or the ability to handle it from the server side. Therefore, Galaxy S26 Ultra users who have updated to One UI 9 are advised not to restore factory settings until the issue is resolved, to avoid the risk of the device not being able to be used normally.