Field Test Mode (FTM) is a diagnostic state pre-installed on many mobile phones. It provides technical statistics related to the mobile network and allows for direct hardware tests. For many ZTE devices, entering FTM mode is a required precursor to more advanced recovery tasks.
Finding the specific "FTM" driver can sometimes be confusing because it is often bundled within broader ZTE driver packages. For the best compatibility, use official sources or reputable driver databases: SOLVED: What does FTM mean - ZTE Phone - iFixit zte ftm drivers
Power off the device, then hold the Volume Down button while connecting it to a PC via a USB cable. Field Test Mode (FTM) is a diagnostic state