Millet 114g network disconnected directly to the new machine. After upgrading the MIUI12.5 enhanced version, the MIUI12.5 series will have network disconnection and WiFi disconnection. At this time, the MIUI12.5 enhanced version has serious bugs, which cannot be solved by restarting the machine. You can only go to the after-sales service to replace it for free, which is the solution provided by Xiaomi at present.
When the Mi 11 is disconnected, the phone can be switched to airplane mode. You can restore it when you turn on network mode.