Xiaomi Redmi K20 Mi 9T davinci QCN Backup
Download Xiaomi Redmi K20 Mi 9T davinci QCN backup from RomWala. Used for repairing null IMEI- baseband unknown- network issues- and RF calibration. Restore using QPST or Xiaomi Tool. Direct link belo...
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Xiaomi Redmi K20 Mi 9T davinci QCN Backup
| Description | QCN (Qualcomm Calibration Network) backup file for Xiaomi Redmi K20 / Mi 9T codename davinci from RomWala. Backup created on 2022-10-23 at 18:51:22. Used for repairing null IMEI- unknown baseband- network issues- Wi-Fi problems- and restoring RF calibration. Restore using QPST or Xiaomi Tool in DIAG mode. |
| Device Name | Xiaomi Redmi K20 / Mi 9T |
| Brand | Xiaomi |
| Model Numbers | M1903F10A, M1903F10C, M1903F10G, M1903F10T |
| Codename | davinci |
| Chipset | Qualcomm SDM730 Snapdragon 730 |
| Chipset Manufacturing Process | 8nm |
| CPU | Octa-core (2x2.2GHz Kryo 470 Gold + 6x1.8GHz Kryo 470 Silver) |
| GPU | Adreno 618 |
| RAM Options | 6GB LPDDR4X |
| Storage Options | 64GB-128GB UFS 2.1 |
| Expandable Storage | No |
| Battery Capacity | 4000mAh non-removable |
| Charging Support | 18W fast charging |
| Display | 6.39 inches Super AMOLED |
| Display Resolution | 1080 x 2340 pixels |
| Display Refresh Rate | 60Hz |
| OS | MIUI 10-12 based on Android 9-11 |
| Rear Camera | 48MP + 13MP + 8MP |
| Front Camera | 20MP pop-up |
| Fingerprint | In-display optical |
| Network | 4G LTE Dual SIM |
| Backup Information | Backup Date: 2022-10-23 Backup Time: 18:51:22 Backup Tool: QPST/QFIL or Xiaomi Tool File Format: QCN (Qualcomm Calibration Network) |
| What is QCN File | QCN (Qualcomm Calibration Network) is a binary file containing calibration information for device components including radio- Wi-Fi- GPS- IMEI- and network parameters. It stores device-specific RF NV (Non-Volatile) items that ensure proper network connectivity. |
| Important Notes | Note 1: Redmi K20 (China) and Mi 9T (Global) share same codename davinci Note 2: This backup is from 2022 - contains calibration data from that time Note 3: Backup original QCN before restoring Note 4: Not for K20 Pro (raphael) or Mi 9T Pro variants |
| Use Cases | Fix baseband unknown after flashing, Restore null IMEI, Repair network connectivity issues, Fix Wi-Fi and Bluetooth calibration problems, Recover corrupted NV data, Resolve 'No Service' or 'Emergency Calls Only' errors |
| Compatible Tools | QPST (Qualcomm Product Support Tools), QFIL, Xiaomi Tool, Octoplus Box, Chimera Tool, UFI Box |
| How to Enable DIAG Mode on davinci | Method 1 - Dialer Code: Dial *#*#717717#*#* on stock dialer Method 2 - ADB Command: adb shell setprop sys.usb.config diag,adb Method 3 - Root Method: Use root file manager to enable DIAG mode Method 4 - Professional Box: Use Octoplus/Chimera Tool to enable DIAG mode |
| How to Enter EDL Mode | Step 1: Power off device completely Step 2: Press and hold Volume Up + Volume Down buttons together Step 3: Connect USB cable to PC while holding both buttons Step 4: Screen stays black - device is in EDL mode Step 5: Check Device Manager for Qualcomm HS-USB QDLoader 9008 Note: Some Mi 9T variants may require test point for EDL mode |
| How to Restore Using QFIL | Step 1: Enable USB Debugging and DIAG mode on device or enter EDL mode Step 2: Open Device Manager - check Qualcomm HS-USB Diagnostics port (9091/9090) or EDL port (9008) Step 3: Launch QFIL as administrator Step 4: Click 'Select Port' and choose the COM port Step 5: Navigate to Tools > QCN Backup/Restore Step 6: Select 'Restore QCN' option Step 7: Browse and select the downloaded .qcn file Step 8: Click 'Restore' button Step 9: Wait for 'Programming Successful' message Step 10: Disconnect device and reboot Step 11: Check IMEI by dialing *#06# |
| How to Restore Using QPST | Step 1: Open QPST Configuration and add COM port Step 2: Open 'Start Clients' > 'Software Download' Step 3: Select 'Restore' tab Step 4: Browse and select QCN file Step 5: Click 'Start' to begin restore Step 6: Wait for completion message Step 7: Restart device |
| How to Write IMEI After QCN Restore (If Needed) | Method 1 - Tool: Use Octoplus/Chimera Tool to write IMEI Method 2 - ADB: Use writeimei tool via ADB (requires root) Method 3 - QXDM: Use QXDM professional tool for Qualcomm chipsets |
| PreRequisites | 70 percent battery, Original USB cable, Qualcomm USB drivers, QPST/QFIL software, Windows PC, USB Debugging enabled or EDL mode, Backup original QCN before restore |
| Advantages | Restore lost IMEI numbers, Fix baseband unknown after flashing, Repair network connectivity issues, Recover RF calibration data, Fix Wi-Fi and Bluetooth problems, Dated backup from working device |
| Requirements | Qualcomm drivers, QPST/QFIL/Xiaomi Tool, Windows PC, USB cable, DIAG/EDL mode, Backup before restore |
| Warnings | Use on Redmi K20 / Mi 9T davinci only, Not for K20 Pro (raphael) or Mi 9T Pro, Restoring incorrect QCN can permanently brick device, Backup original QCN first, IMEI numbers must match device, IMEI modification laws apply, All operations at your own risk |
| Troubleshooting | Device not detected - reinstall Qualcomm drivers, DIAG mode not working - try EDL mode or test points, Restore fails - try different USB cable/port, QFIL error - use QPST instead, IMEI still null - write IMEI manually using tool, Baseband unknown - reflash firmware via Mi Flash Tool |
Xiaomi Redmi K20 Mi 9T davinci QCN Backup - Description & Features
Download Xiaomi Redmi K20 Mi 9T davinci QCN backup from RomWala. Used for repairing null IMEI- baseband unknown- network issues- and RF calibration. Restore using QPST or Xiaomi Tool. Direct link below.
Tags:
#RedmiK20 #Mi9T #davinci #QCNFile #IMEIRepair #BasebandFix #QPST #XiaomiTool #RomWala
Tags:
#RedmiK20 #Mi9T #davinci #QCNFile #IMEIRepair #BasebandFix #QPST #XiaomiTool #RomWala
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