Google Pixel 4 QCN File
Download Google Pixel 4 QCN file from RomWala. Used for fixing network issues- baseband problems- IMEI restoration and RF calibration. Restore using QPST or QFIL tool in DIAG mode. Direct link below. ...
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Google Pixel 4 QCN File
| Description | QCN (Qualcomm Calibration Network) file for Google Pixel 4 from RomWala. Used for repairing null IMEI- unknown baseband- network issues- Wi-Fi problems- and restoring RF calibration. Restore using QPST or QFIL tool in Qualcomm DIAG mode. |
| Device Name | Google Pixel 4 |
| Brand | |
| Model Numbers | G020J, G020M, G020N, G020P, G020Q |
| Codename | flame |
| Chipset | Qualcomm Snapdragon 855 SM8150 |
| Chipset Manufacturing Process | 7nm |
| CPU | Octa-core (1x2.84GHz Kryo 485 + 3x2.42GHz Kryo 485 + 4x1.78GHz Kryo 485) |
| GPU | Adreno 640 |
| RAM Options | 6GB LPDDR4X |
| Storage Options | 64GB-128GB UFS 2.1 |
| Expandable Storage | No |
| Battery Capacity | 2800mAh non-removable |
| Charging Support | 18W fast charging, 5W wireless charging |
| Display | 5.7 inches AMOLED |
| Display Resolution | 1080 x 2160 pixels |
| Display Refresh Rate | 90Hz |
| OS | Android 10-13 (upgradable to Android 14) |
| Rear Camera | 12.2MP + 16MP |
| Front Camera | 8MP |
| Fingerprint | No (Face unlock only) |
| Network | 4G LTE Dual SIM (eSIM support) |
| 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 [citation:3][citation:6]. |
| Use Cases | Fix baseband unknown after flashing, Restore null IMEI, Repair network connectivity issues, Fix Wi-Fi calibration problems, Recover corrupted NV data, Resolve 'No Service' or 'Emergency Calls Only' errors |
| Compatible Tools | QPST (Qualcomm Product Support Tools), QFIL (Qualcomm Flash Image Loader), CP Tool, Miracle Box, Octoplus Box, Chimera Tool [citation:2] |
| How to Restore Using QFIL | Prerequisites: Enable USB Debugging in Developer Options, Device rooted or use ADB to enable DIAG mode, Install Qualcomm USB drivers, Download QPST/QFIL package Step 1: Open command prompt in platform-tools folder and execute: adb shell setprop sys.usb.config rndis,diag,adb [citation:4] Step 2: Check Device Manager for Qualcomm HS-USB Diagnostics 9091 port Step 3: Launch QFIL tool as administrator Step 4: Click 'Select Port' and choose the 9091 port Step 5: Click 'Tools' menu and select 'QCN Backup/Restore' [citation:4] Step 6: Click 'Restore QCN' option Step 7: Browse and select the downloaded .qcn file Step 8: Click 'Browse' to choose QCN file then click 'Restore' button Step 9: Wait for completion message - 'Programming Successful' Step 10: Disconnect device and reboot [citation:4][citation:5] |
| How to Restore Using QPST | Prerequisites: Qualcomm 9008/EDL mode or DIAG mode enabled, QPST installed Step 1: Open QPST Configuration and add COM port Step 2: Ensure device shows as 'Enabled' in QPST [citation:7] Step 3: Open 'Start Clients' > 'Software Download' [citation:7] Step 4: Select 'Restore' tab Step 5: Click 'Browse' and select the QCN file Step 6: Select the correct COM port Step 7: Click 'Start' to begin restore process [citation:7] Step 8: Wait for progress bar to reach 100% Step 9: Restart the device manually |
| How to Enable DIAG Mode (Non-Rooted) | Use CP Tool which supports Pixel devices including Pixel 4 for EUB and DIAG mode operations [citation:2]. Professional boxes like Octoplus or Chimera Tool can also enable DIAG mode without root. |
| How to Enable DIAG Mode (Rooted) | Root device and use adb commands: adb shell su -c 'setprop sys.usb.config diag,adb' |
| PreRequisites | 70 percent battery, Original USB cable, Qualcomm USB drivers installed, Windows PC, QPST/QFIL software, Backup original QCN before making changes, USB Debugging enabled (for DIAG mode) [citation:4] |
| Advantages | Restore lost IMEI numbers, Fix baseband unknown after flashing, Repair network connectivity issues, Recover RF calibration data, Fix Wi-Fi and Bluetooth problems, No need for full firmware reflash |
| Important Notes | QCN file is model-specific - use only for Google Pixel 4 flame variant, Write IMEI back using writeimei tool after QCN restore, QCN contains IMEI data - backup original first, This file is for repair purposes only, IMEI numbers must match the device serial number and be legally owned [citation:5][citation:7] |
| Warnings | Use on Google Pixel 4 only, Restoring incorrect QCN can permanently brick device RF section, Backup original QCN before any restore operation, IMEI modification laws vary by country, All operations at your own risk, Professional repair recommended for inexperienced users, Write IMEI after QCN restore if showing null [citation:3] |
| Troubleshooting | Device not detected - reinstall Qualcomm drivers and check port in Device Manager, DIAG mode not working - use CP Tool or professional box, Restore fails - try different USB cable or port, IMEI still null after restore - write IMEI manually using writeimei tool [citation:4], Baseband still unknown - reflash modem partition via fastboot, Restore process stuck at 50 percent - check device connection and reboot both PC and device |
| Files Included | Single .qcn file for Google Pixel 4 (flame), Contains RF calibration and NV data |
Google Pixel 4 QCN File - Description
Download Google Pixel 4 QCN file from RomWala. Used for fixing network issues- baseband problems- IMEI restoration and RF calibration. Restore using QPST or QFIL tool in DIAG mode. Direct link below.
Tags:
#GooglePixel4 #Pixel4 #QCNFile #IMEIRepair #BasebandFix #QPST #QFIL #RomWala
Tags:
#GooglePixel4 #Pixel4 #QCNFile #IMEIRepair #BasebandFix #QPST #QFIL #RomWala
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