Xiaomi sub-brand Redmi has released the stable ROM of Android Pie for the Redmi S2 in China and the Redmi Y2 (rebranded S2) in India. The new firmware requires a download of 1.4GB and sports version number MIUI V10.3.3. It lets you lock Google Contacts and comes with a fix for an issue related to deletion of contacts from the SIM card. You can check out the full changelog below: App lock New: Locking Google contacts is available now Contacts Fix: Contacts couldn't be deleted from SIM cards in some cases Lockscreen, status...
Source: https://www.gsmarena.com/redmi_y2_s2_android_pie_update-news-38519.php