The most common problems of smartphones with MIUI 12 are named

Representatives of the official “Xiaomi” Mi Community informed MIUI 12 users about critical bugs in Redmi, Roso and Xiaomi phones after firmware download. This review lists the most common and dangerous bugs detected recently.

Critical bugs that have the most negative impact on the smartphones of these brands:

Continuous loading of devices when trying to install MIUI 12 (the failure was detected among the clients of Indian telecom service provider Airtel, mainly using Poco devices);

inability to update system applications, resulting in camera malfunctions, Discord hangs, etc. (the most vulnerable category is owners of Roso X3 and Redmy 6 Pro/Note 7);
lack of access to App Vault and incorrect operation of the application sensor in European versions of “Redmy Note 9 Pro”;
screen flare when using MIUI Notes (the problem is relevant for smartphones “Xiaomi Mi Mi 9 Lite/10/9T Pro”);
failure of the Nova Lounch immediately after the “pouring” of MIUI 12 (geography of bug – the whole world);
inability to access the network from the second SIM card (“Xiaomi Mi 10/9T” and “Redmy K30”).

Some of the above failures are solved by “rollback” to the factory settings. Xiaomi” representatives stated that they are aware of problems with MIUI 12 and promise to eliminate bugs as soon as possible.