Before we proceed, a critical legal note. In most jurisdictions (USA, EU, UK, India), tampering with or changing the IMEI number of a device is illegal if done to hide a stolen phone or avoid carrier blacklists. However, restoring your original IMEI (the one printed on your phone box) to a device you legally own is generally considered a repair right. This article assumes you are using a QCN IMEI Repair Tool to restore lost data, not forge new numbers.
Dial *#*#4636#*#* (Testing menu). Look at "Phone Info." If "Current Network" says "Unknown" and Ping fails, proceed. qcn imei repair tool
Qualcomm is the manufacturer of processors in 90% of Android phones (Samsung, Xiaomi, OnePlus, Google Pixel, etc.). These chips use a specific partition called QCN (Qualcomm Calibration Network). If this partition gets corrupted during a failed
The QCN file contains:
If this partition gets corrupted during a failed firmware flash (flashing stock ROM), a wrong region update, or a deep system crash, your IMEI disappears.
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Before we proceed, a critical legal note. In most jurisdictions (USA, EU, UK, India), tampering with or changing the IMEI number of a device is illegal if done to hide a stolen phone or avoid carrier blacklists. However, restoring your original IMEI (the one printed on your phone box) to a device you legally own is generally considered a repair right. This article assumes you are using a QCN IMEI Repair Tool to restore lost data, not forge new numbers.
Dial *#*#4636#*#* (Testing menu). Look at "Phone Info." If "Current Network" says "Unknown" and Ping fails, proceed.
Before downloading any software, you must understand what you are fixing.
Qualcomm is the manufacturer of processors in 90% of Android phones (Samsung, Xiaomi, OnePlus, Google Pixel, etc.). These chips use a specific partition called QCN (Qualcomm Calibration Network).
The QCN file contains:
If this partition gets corrupted during a failed firmware flash (flashing stock ROM), a wrong region update, or a deep system crash, your IMEI disappears.
