Most users report ERROR or CME ERROR: operation not allowed . Success rate: <5% on post-2020 firmware. Why? The command parser rejects write requests to the NV (non-volatile) memory.
It’s not worth the felony charge. Buy an unlocked replacement. fibocom l850gl change imei work
: Using software tools to read the NVM data, hex-editing the IMEI string, and writing it back to the hardware. Necessary Tools Most users report ERROR or CME ERROR: operation not allowed
Changing an IMEI is illegal in many jurisdictions (such as the UK and parts of Europe) if done to facilitate fraudulent activity. hex-editing the IMEI string