[Xiaomi Redmi Note 6 Pro Questions & Answers] vhviveiros:
Basically:

-Wifi doesn't toggle on

-Sim card is not recognized (already tried other ones, in both slots)

I started with this problem: https://xdaforums.com/redmi-note-6-pro/help/help-locked-device-t4111909 and could reflash with new rom. But after 12h, the networking issue has back even with another rom (still the global official). I hope you can help me. I tracked some errors in logcat when trying to switch the wifi:

2020-06-16 12:49:11.111 708-708/? E/android.hardware.wifi@1.0-service: Failed to write driver state control param: Invalid argument

2020-06-16 12:49:11.111 708-708/? E/android.hardware.wifi@1.0-service: Failed to load WiFi driver

2020-06-16 12:49:11.111 708-708/? E/android.hardware.wifi@1.0-service: Failed to initialize firmware mode controller

2020-06-16 12:49:11.111 708-708/? E/android.hardware.wifi@1.0-service: Wifi HAL start failed

2020-06-16 12:49:11.121 1993-2015/? E/BatteryExternalStatsWorker: no controller energy info supplied for wifi

2020-06-16 12:49:11.131 1993-2015/? E/BatteryExternalStatsWorker: no controller energy info supplied for wifi

2020-06-16 12:49:31.131 708-708/? E/android.hardware.wifi@1.0-service: Failed to write driver state control param: Invalid argument

2020-06-16 12:49:31.131 708-708/? E/android.hardware.wifi@1.0-service: Failed to load WiFi driver

2020-06-16 12:49:31.131 708-708/? E/android.hardware.wifi@1.0-service: Failed to initialize firmware mode controller

2020-06-16 12:49:31.131 708-708/? E/android.hardware.wifi@1.0-service: Wifi HAL start failed

2020-06-16 12:49:31.132 1993-2015/? E/BatteryExternalStatsWorker: no controller energy info supplied for wifi

2020-06-16 12:49:31.139 1993-2015/? E/BatteryExternalStatsWorker: no controller energy info supplied for wifi

2020-06-16 12:52:59.804 1993-2015/? E/BatteryExternalStatsWorker: no controller energy info supplied for wifi

2020-06-16 12:53:04.311 1993-2015/? E/BatteryExternalStatsWorker: no controller energy info supplied for wifi

2020-06-16 12:53:25.810 1993-2015/? E/BatteryExternalStatsWorker: no controller energy info supplied for wifi

2020-06-16 12:53:26.274 1993-2015/? E/BatteryExternalStatsWorker: no controller energy info supplied for wifi

2020-06-16 12:53:33.823 1993-2015/? E/BatteryExternalStatsWorker: no controller energy info supplied for wifi

2020-06-16 12:53:35.102 1993-2015/? E/BatteryExternalStatsWorker: no controller energy info supplied for wifi

2020-06-16 12:53:38.029 1993-2015/? E/BatteryExternalStatsWorker: no controller energy info supplied for wifi

2020-06-16 12:54:20.073 708-708/? E/android.hardware.wifi@1.0-service: Failed to write driver state control param: Invalid argument

2020-06-16 12:54:20.073 708-708/? E/android.hardware.wifi@1.0-service: Failed to load WiFi driver

2020-06-16 12:54:20.073 708-708/? E/android.hardware.wifi@1.0-service: Failed to initialize firmware mode controller

2020-06-16 12:54:20.073 708-708/? E/android.hardware.wifi@1.0-service: Wifi HAL start failed

2020-06-16 12:54:20.074 1993-2085/? E/HalDevMgr: IWifiEventCallback.onFailure: 9 ()

2020-06-16 12:54:20.074 1993-2102/? E/HalDevMgr: Cannot start IWifi: 9 ()

2020-06-16 12:54:20.074 1993-2102/? E/WifiVendorHal: Failed to start vendor HAL

2020-06-16 12:54:20.074 1993-2102/? E/WifiNative: Failed to start vendor HAL

2020-06-16 12:54:20.074 1993-2102/? E/WifiNative: Failed to start Hal

2020-06-16 12:54:20.074 1993-2102/? E/WifiClientModeManager: Failed to create ClientInterface. Sit in Idle

2020-06-16 12:54:20.078 1993-2015/? E/BatteryExternalStatsWorker: no controller energy info supplied for wifi

2020-06-16 12:54:40.091 708-708/? E/android.hardware.wifi@1.0-service: Failed to write driver state control param: Invalid argument

2020-06-16 12:54:40.091 708-708/? E/android.hardware.wifi@1.0-service: Failed to load WiFi driver

2020-06-16 12:54:40.091 708-708/? E/android.hardware.wifi@1.0-service: Failed to initialize firmware mode controller

2020-06-16 12:54:40.092 708-708/? E/android.hardware.wifi@1.0-service: Wifi HAL start failed

2020-06-16 12:54:40.092 1993-2102/? E/HalDevMgr: Cannot start IWifi: 9 ()

2020-06-16 12:54:40.092 1993-2102/? E/WifiVendorHal: Failed to start vendor HAL

2020-06-16 12:54:40.092 1993-2102/? E/WifiNative: Failed to start vendor HAL

2020-06-16 12:54:40.092 1993-2102/? E/WifiNative: Failed to start Hal

2020-06-16 12:54:40.092 1993-2085/? E/HalDevMgr: IWifiEventCallback.onFailure: 9 ()

2020-06-16 12:54:40.092 1993-2102/? E/WifiScanOnlyModeManager: Failed to create ClientInterface. Sit in Idle

2020-06-16 12:54:40.095 1993-2015/? E/BatteryExternalStatsWorker: no controller energy info supplied for wifi

2020-06-16 12:55:00.110 708-708/? E/android.hardware.wifi@1.0-service: Failed to write driver state control param: Invalid argument

2020-06-16 12:55:00.111 708-708/? E/android.hardware.wifi@1.0-service: Failed to load WiFi driver

2020-06-16 12:55:00.111 708-708/? E/android.hardware.wifi@1.0-service: Failed to initialize firmware mode controller

2020-06-16 12:55:00.111 708-708/? E/android.hardware.wifi@1.0-service: Wifi HAL start failed

2020-06-16 12:55:00.111 1993-2085/? E/HalDevMgr: IWifiEventCallback.onFailure: 9 ()

2020-06-16 12:55:00.111 1993-2102/? E/HalDevMgr: Cannot start IWifi: 9 ()

2020-06-16 12:55:00.111 1993-2102/? E/WifiVendorHal: Failed to start vendor HAL

2020-06-16 12:55:00.111 1993-2102/? E/WifiNative: Failed to start vendor HAL

2020-06-16 12:55:00.111 1993-2102/? E/WifiNative: Failed to start Hal

2020-06-16 12:55:00.111 1993-2102/? E/WifiClientModeManager: Failed to create ClientInterface. Sit in Idle

2020-06-16 12:55:00.118 1993-2015/? E/BatteryExternalStatsWorker: no controller energy info supplied for wifi

2020-06-16 12:55:20.122 708-708/? E/android.hardware.wifi@1.0-service: Failed to write driver state control param: Invalid argument

2020-06-16 12:55:20.122 708-708/? E/android.hardware.wifi@1.0-service: Failed to load WiFi driver

2020-06-16 12:55:20.122 708-708/? E/android.hardware.wifi@1.0-service: Failed to initialize firmware mode controller

2020-06-16 12:55:20.123 708-708/? E/android.hardware.wifi@1.0-service: Wifi HAL start failed

2020-06-16 12:55:20.123 1993-2102/? E/HalDevMgr: Cannot start IWifi: 9 ()

2020-06-16 12:55:20.124 1993-2102/? E/WifiVendorHal: Failed to start vendor HAL

2020-06-16 12:55:20.124 1993-2102/? E/WifiNative: Failed to start vendor HAL

2020-06-16 12:55:20.124 1993-2085/? E/HalDevMgr: IWifiEventCallback.onFailure: 9 ()

2020-06-16 12:55:20.124 1993-2102/? E/WifiNative: Failed to start Hal

2020-06-16 12:55:20.124 1993-2102/? E/WifiScanOnlyModeManager: Failed to create ClientInterface. Sit in Idle

2020-06-16 12:55:20.127 1993-2015/? E/BatteryExternalStatsWorker: no controller energy info supplied for wifi

2020-06-16 12:55:20.148 1993-2015/? E/BatteryExternalStatsWorker: no controller energy info supplied for wifi

2020-06-16 12:55:25.107 1993-2102/? E/WifiStateMachine: getWifiLinkLayerStats called without an interface

2020-06-16 12:55:25.741 1993-2015/? E/BatteryExternalStatsWorker: no controller energy info supplied for wifi