Reconnect and use AT+CGMR again to confirm the new version.
Using outdated firmware leads to:
This article provides a deep dive into everything you need to know about ML7820 B firmware: what it is, why you need to update it, where to find legitimate versions, step-by-step flashing procedures, and how to fix common post-update problems.
Some newer firmware enables SIM PIN by default. Disable it:
Reconnect and use AT+CGMR again to confirm the new version.
Using outdated firmware leads to:
This article provides a deep dive into everything you need to know about ML7820 B firmware: what it is, why you need to update it, where to find legitimate versions, step-by-step flashing procedures, and how to fix common post-update problems.
Some newer firmware enables SIM PIN by default. Disable it:
