In many cases, you must wipe the corrupted EFS/NVRAM partitions first. In the tool, select "Wipe EFS" while the phone is in EDL (Emergency Download Mode - 9008) or Diag Mode.
Hold down both the and Volume Down buttons simultaneously.
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Input your original 15-digit and IMEI 2 into the designated fields. Click Write QCN or Repair IMEI .
Install the official Qualcomm HS-USB QDLoader 9008 drivers on your Windows PC. In many cases, you must wipe the corrupted
Open on your PC with the phone connected in Diag Mode. Go to Start Clients > Software Download > Backup . Save the phone's current QCN file to your PC.
Tools like IMEI Rebuilder or Dual IMEI Write to inject the original numbers into a blank QCN file. This public link is valid for 7 days
Inside your service tool, select the function.
: The QCN file used may have incorrect baseband calibration data. Flash a verified clean CPH1937 engineering QCN file matching your exact firmware version. To help narrow down the issue, let me know:
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