Please send me the latest firmware:
[2026-10-04 21:22:34:661_R:] ATI
[2026-10-04 21:22:34:678_R:] Quectel
[2026-10-04 21:22:34:678_R:] RM520N-GL
[2026-10-04 21:22:34:678_R:] Revision: RM520NGLAAR01A08M4G
[2026-10-04 21:22:34:678_R:] OK
[2026-10-04 21:22:34:695_S:] AT+QURCCFG=“URCPORT”,“usbmodem”
[2026-10-04 21:22:34:704_R:] AT+QURCCFG=“URCPORT”,“usbmodem”
[2026-10-04 21:22:34:726_R:] OK
/* Use AT+CPIN? to query the SIM card status : SIM card inserted or not, locked or unlocked */
[2026-10-04 21:22:34:757_S:] AT+CPIN?
[2026-10-04 21:22:34:765_R:] AT+CPIN?
[2026-10-04 21:22:34:768_R:] +CME ERROR: SIM not inserted
/* Make sure SIM card is unlocked */
[2026-10-04 21:22:55:261_S:] AT+QGMR
[2026-10-04 21:22:55:267_R:] AT+QGMR
[2026-10-04 21:22:55:272_R:] RM520NGLAAR01A08M4G_01.200.01.200
[2026-10-04 21:22:55:272_R:] OK