Also check with:
AT^NVWR=4,0,15,<IMEI hex> AT^NVWR=4,15,2,<checksum hex> Check with:
ATI AT+CGMM AT+CGSN Expected response: 15-digit IMEI. If 0 or ERROR – NVRAM corrupt. 5. IMEI Repair Commands (by modem generation) A. Old Huawei modems (E1550, E173, E303) – AT^NVIMEI AT^NVIMEI=<15-digit IMEI> Example:
AT^NVIMEI? After reboot:
AT+CGSN Should return your restored original IMEI.
