A: Proceed with caution. Files from forums like GSM-Forum can be a lifesaver if your phone is a "hard-brick" case. However, they are from donor phones and contain their IMEI. Using them is only a temporary step to allow you to write your own original IMEI. You cannot legally use a donor IMEI as your own.
: Corruption or loss of NV data usually results in "IMEI Null," "Unknown Baseband," or "Not Registered on Network" errors. Common Technical Issues Security Damage Error (1)
A: Samsung phones use NV Data for modem settings and locks, stored in EFS (which is the encrypted folder containing your unique device identity). QCN, on the other hand, is generally for Qualcomm devices and contains calibration data for the network. sm-g920f nv data file
Specialized software boxes and tools are standard for managing these files:
After this, your baseband should return. The IMEI will show a generic number like 004999010640000 . This is a test IMEI. You now need to restore your original IMEI using professional tools (see below). A: Proceed with caution
Shows a generic number (starting with 0049) or null/null .
This guide explains exactly what the NV data file is, the problems that arise when it fails, and the available solutions for restoring your device. Using them is only a temporary step to
The (Non-Volatile data) for the Samsung Galaxy S6 ( Go to product viewer dialog for this item.
: Most deep NV data modifications require the device to be rooted.
: Often necessary if the NV data partition becomes corrupted during flashing or rooting.