On older Nokia devices built on the Series 30 (S30) platform like the X1-01, the IMEI number is deeply embedded within a write-once section of the phone's hardware architecture, specifically inside the UEM (Universal Energy Management) chip or protected flash memory areas.
Nokia X1-01 Default System Specifications: ├── Operating System: Series 30 (S30) ├── Network: GSM Dual-band (900/1800 MHz) └── Identity Security: Fixed Hardware-Linked IMEI The Reality of "IMEI Change Codes" Nokia X1-01 Imei Change Code
If software corruption persists, flashing the original Nokia X1-01 RM-713 firmware may resolve the IMEI display issue. This requires: On older Nokia devices built on the Series