No. Carrier lock is stored in a separate partition (NVRAM). Flashing stock firmware typically does not SIM-unlock the phone. You need an unlock code from your carrier.
Using the wrong firmware can hard-brick the device (preloader corruption). Zte Blade L210 Firmware
Firmware is the permanent software programmed into a device's read-only memory. For the ZTE Blade L210, it manages vital tasks such as: Hardware Initialization: You need an unlock code from your carrier
Would you like the direct links to official firmware or step-by-step flashing instructions for the Blade L210? For the ZTE Blade L210, it manages vital
Firmware is the software that controls the hardware components of a smartphone. It acts as an intermediary between the hardware and the operating system, managing the flow of data and instructions between them. Firmware is responsible for controlling the smartphone's basic functions, such as booting up, making calls, and accessing the internet.
These allow your computer to recognize the phone in "Download Mode."
You flashed firmware with the wrong touch panel driver. This happens when using firmware from a different hardware revision. Re-download the correct firmware variant (e.g., “BOE” vs “Tianma” screen versions).