Educational Purpose: Methods like those found on YouTube are intended for legal device repair and should not be used on stolen handsets.
Flashing the Jazz Digit 4G Lite with an SPD (Spreadtrum) flash file is a common solution for fixing software issues like being stuck on the logo, dead boot repair, or unlocking the device Preparation Checklist
Load the File: Open the SPD Upgrade Tool, click the gear icon (Load Packet), and select your .pac flash file. Connect Device: Power off the phone and remove the battery. Hold the Boot Key (usually the Center button or '*' key). Insert the USB cable while holding the key.