Vivo X6S Plus Firmware – Fix No Signal or No Network Problem
If your Vivo X6S Plus shows “No Service” or cannot detect SIM cards after flashing, then you’re facing a common network issue that happens due to corrupted baseband, EFS partition loss, or wrong firmware version. Flashing the official QFIL firmware can restore your network signal and fix IMEI-related problems.
Common Symptoms of Network Issues
- No Signal or Emergency Calls Only
- SIM not detected after flash
- IMEI showing as Null or 000000
- Baseband Unknown in settings
Root Cause of Network Loss After Flash
Signal issues in Vivo X6S Plus usually occur when EFS, modem, or QCN files are missing or mismatched during flashing. Using incorrect firmware or an interrupted flash process can also break the network components.
Note: Always use the correct QFIL flash file that includes modem and NON-HLOS.bin to recover signal issues after flashing.
Required Files for Flashing
| Download Vivo X6S Plus Stock ROM (PD1515BD) |
| QPST/QFIL Tool |
| Qualcomm USB Drivers |
Steps to Prepare for Flashing
- Charge your phone above 50%
- Install QPST and USB Drivers on your PC
- Extract the stock ROM with WinRAR or 7zip
- Backup important files as data will be erased
How to Flash Vivo X6S Plus & Fix Signal Issue
- Open QFIL and set the mode to “Flat Build”
- Load the
prog_emmc_firehose_8976.mbnfile - Click “Load XML” and select both
rawprogram.xmlandpatch.xml - Boot the phone into EDL mode (use test point if needed)
- Connect the phone via USB — it should show as Qualcomm HS-USB
- Click “Download” in QFIL to begin flashing
Reminder: For full signal recovery, make sure NON-HLOS.bin and QCN files are present and flashed successfully.
Post Flash Tips
- If signal doesn't return, flash QCN backup (if available)
- Verify baseband under Settings > About Phone
- Try resetting network settings
Still facing issues? Drop your question in the comments and our support team will help you with the correct steps.
Tags: Vivo X6S Plus No Signal Fix, Vivo X6S Plus Network Problem, QFIL Flash Vivo X6S Plus, Flash Firmware Without Signal Loss, Qualcomm MSM8976 ROM