Samsung IMEI Null After Flashing

When Samsung Galaxy IMEI shows as null (000000000000000) or the device has no service after firmware flashing, it typically means the modem (CP) partition was not flashed correctly, the wrong regional firmware was used, or the EFS partition got corrupted. Samsung IMEI repair in 2026 requires a different approach than MTK devices since Samsung uses Qualcomm or Exynos rather than MediaTek.

Diagnose Samsung IMEI Issue

  1. Dial *#06# — if shows null or 000000 → IMEI lost
  2. Settings → About Phone → Baseband Version → if shows Unknown → modem issue
  3. Check Settings → About Phone → Status → IMEI Information

Fix Method 1 — Flash Complete Firmware with Correct CSC

The most effective fix — flashes all partitions including the modem:

  1. Find your exact Samsung model number (Settings → About Phone)
  2. Identify your original country/region CSC code
  3. Download complete firmware for your exact model and region
  4. In Odin, load all four partitions — BL, AP, CP, CSC
  5. Important: Use main CSC file (not HOME_CSC) to fully restore
  6. Flash complete firmware
  7. After reboot, dial *#06# — IMEI should be restored

Fix Method 2 — Flash Only CP (Modem) File

For faster repair when only modem is the issue:

  1. Download correct firmware for your Samsung model
  2. Extract and identify the CP file (filename starts with CP_)
  3. Open Odin and load ONLY the CP file in the CP slot
  4. Leave BL, AP, CSC slots empty
  5. Enter Download Mode and flash CP only
  6. Device reboots — check baseband version and IMEI

Fix Method 3 — EFS Backup Restore

If EFS backup was created before the issue:

  1. EFS partition contains Samsung IMEI and network calibration
  2. Restore EFS backup using Z3X Box or professional Samsung tool
  3. EFS restore returns IMEI to original state

Prevention — Create EFS Backup Before Flashing

  1. Before any Samsung firmware operation, create EFS backup
  2. Use Z3X Box Samsung Tool or similar
  3. Save EFS backup to PC with device model and IMEI in filename
  4. If IMEI lost after flash, restore from this backup
✅ Key Point: Samsung IMEI is stored in the EFS partition and backed up in the CP (modem) firmware. Flashing CP with correct regional firmware almost always restores Samsung IMEI without needing specialized tools.

Conclusion

Samsung IMEI null after flashing is fixed by reflashing correct regional firmware including CP partition using Odin Tool. Always use complete firmware matching your exact Samsung model and region CSC code. Download Samsung firmware and Odin Tool from this website for all Samsung IMEI repair operations in 2026.