The MIUI 9 Global ROM was scheduled to hit the third batch of devices which included the Redmi Note 3, Redmi 3S and Redmi 3S Prime, back in December 2017. However, it was delayed due to some critical bug in the update. It seems now that the Chinese phone maker has now skipped the MIUI 9.0 and is instead rolling out MIUI 9.2 directly.
The new update comes as MIUI 184.108.40.206.MALMIEK and is of around 376 MB in size. The update is still based on Android Marshmallow only, and the base version has not been updated to Android Oreo.
The MIUI 9.2 update for Redmi 3S/3S Prime comes with April 2017 security patch, which is outdated since the January 2018 update patch has already been rolled out. The older security patch leaves the devices vulnerable to the KRACK WPA2 which Xiaomi has fixed in the other devices including the Redmi Note 3.
Also, do note that this MIUI 9.2 update is a Nightly Build. Xiaomi usually releases Nightly updates to random users to get feedback, and the same update will be rolled out to all the users as a Stable build if the feedback comes out good.
Interestingly, the MIUI 9.2 update brings some latest features for its users on the Redmi 3S and Redmi 3S Prime. New additions include interactive and Fresh UI changes, with changes in the lockscreen, status bar and notification bar. There are also new optimised themes which include a redesigned home page as well as updated Peach blossom and Asphalt themes.
The update also brings along a new Gallery App, Calendar Cards, App Vault, Mi Video App, updated Mi Explorer and Mi Drop. The smartphones get an improved layout and readability for search results in Contacts, improved battery usage feature and better blocklist rules with separated rules for each SIM card.
As always, the update is has been rolled out only to select batch Redmi 3S and 3S Prime users and will reach all other users in a few days. Users can still manually check for the update by following these steps: Go to Settings > Scroll down > Tap About Phone > Tap System updates.