– a bad flash can permanently brick the device. If you're interested, search for "MW40V OpenWRT port" or "MW40V band locking via AT commands" (no full custom firmware exists as of 2025, only script-based tweaks).
: Firmware from specific carriers (like Optus or Airtel) may be locked. Unofficial firmware "flashing" to unlock the device for all SIMs carries a risk of bricking the hardware and is generally not supported by the manufacturer. Troubleshooting Alcatel Router Internet Connectivity Issues Alcatel Mw40v Firmware