Before you even think about downloading a file titled "Firmware ZTE Light," you must be absolutely certain of your hardware model. Flashing the wrong firmware can permanently destroy your device.
ZTE produces dozens of devices that might fall under a "Light" description. You need to find the model number. This is usually found: Firmware ZTE Light
A: No. Flashing stock firmware does not SIM unlock. You need a network unlock code. Before you even think about downloading a file
A: Check Archive.org for ZTE’s old support pages. Or search XDA for “ZTE V9 stock firmware backup.” Firmware ZTE Light
To see what software version your tablet is currently running: Open the menu. Scroll down and tap About Tablet (or About Phone ).