Troubleshooting steps and settings
No network signals/SIM card not getting detected
1. Enable Airplane Mode and disable it once and see if it makes any difference
2. Restart the phone once. If it doesn't help, then check if the sim card is inserted properly in the SIM card slot. Try interchanging the sim positions in the sim tray of the phone (if the phone has 2 sim slots).
Also check if the MIUI is updated on the phone. To do so, go Settings > About Phone > Tap on the MIUI 12 Logo > Check for Updates > Download if the update is available
3. Check the region selected on the device: Settings >> Additional Settings >> Region >> India.
4. Check by selecting the network manually: Settings>> SIM Card and Mobile Network >> Select SIM >> Mobile Network >> Select Network Automatically (Toggle Off) >> Choose Network Manually>>Next>>Select the Operator Name (Ask customer to select Operator Name whose Network is provided by SIM operator in customer's location)
5. Check if the same SIM is working in another mobile phone, and also ask the customer to insert different SIM cards in this phone and check if it works (If identified SIM as defective - ask the customer to contact service provider for SIM change process)
6. Check the status of the SIM card by opening the dialup interface and enter the following code.
7. Hardware Test - Dial *#*#6484#*#* >> SIM Test >> Pass/Fail
Tap on SIM Detect or SIM Test option. If it says Sim inserted in the slot number where the customers sim card is actually inserted, then the hardware is fine. If not, then it is a hardware issue.
8.If the hardware test is pass, then backup all the data and perform a "Factory Reset". Please don't forget to ask the customer to transfer the backup file to a computer/removable storage device before doing a factory reset.
9.If the reset does not help, then the device needs to be taken to the nearest ASC and get it checked.
MiUi Version Update Status/Factory Reset:
1.If this problem occurred after a recent system update,follow these steps - check if the customer has received any update of MIUI in System Updates
System Update: Settings > About Phone > Tap on the MIUI 12 Logo > Check for Updates > Download if the update is available
2. If an update is not available or the problem is not resolved post update - suggest Factory Data Reset and Backup process
3. Factory Data Reset: Settings >> About Phone >> Factory Reset>> Erase all data>>Reset Phone (First suggest customer to take external data back up before following Factory Reset procedure)
4. To take a backup: Settings >> About Phone >> Backup & Restore >> Select the method of backup
a) Local: Mobile device / Computer. If the backup file is stored in the mobile, do not forget to transfer to an external storage/computer device before factory reset.
b) Xiaomi cloud > Sign in to Xiaomi cloud if you haven’t and later take a backup
c) Google backup > Backup account
4. If the issue still persists, please ask the customer to contact a Service Centre nearby
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