: Checks if the SIM card requires a PIN code. A response of +CPIN: READY means no PIN is needed. Huawei AT Commands for 3G Modems | PDF - Scribd
: Sets the device to modem-only mode, which can improve detection speed for certain software. dc-unlocker commands list
Unlocking a Huawei USB dongle:
: These perform specific, immediate operations, like checking signal quality with AT+CSQ . : Checks if the SIM card requires a PIN code