From Quectel forum:

  • How to check current band configuration: AT+QCFG=“band”
  • AT+QNWINFO only shows the primary band, you can use AT+QCAINFO to check the CA bands if network support CA.

Learn more: https://forums.quectel.com/t/ep06alar02a07m4g-lte-band-lock-and-carrier-aggregate/5879