This is for power users. You can use Telnet or send AT commands directly to the modem chip (HiSilicon LTE Cat6) to:
: Find the 15-digit IMEI number on the sticker at the bottom of the router or in the admin panel under Device Information . huawei router b311221 unlock firmware patched
The term "Patched Firmware" refers to a modified version of the Huawei stock firmware ( B311-221_firmware.bin ) that has been to bypass security checks. This is for power users