Let’s clarify the terminology. Many people confuse SIM unlocking (entering a code) with firmware unlocking (rewriting the operating system).
After unlocking, you can force the router to ignore internal antennas. Send AT^ANTENNA=1 to enable TS-9 ports. B311-221 Unlock Firmware
Before diving into the flash, confirm that your router is actually locked. Let’s clarify the terminology
Step 1 – Insert a foreign SIM card.
Take a SIM from a carrier different than the one you bought the router from. Insert it and power on the device. Before diving into the flash, confirm that your
Step 2 – Observe the behavior.
Step 3 – Check your current firmware version.
Log into the router (usually 192.168.8.1 or 192.168.1.1). Navigate to Settings > Device Information. Look for a string like 11.170.01.00.00 or 21.200.03.00.123. If the version ends with a carrier abbreviation (e.g., ...TMO, ...VDF), you are locked.