Sites like GoFirmware and DeviceAtlas host various versions of the MSD338 firmware.
Before downloading firmware, confirm your hardware matches these technical details to avoid "bricking" your device: Android 4.4.4 (KitKat). RAM: 512MB. Processor: Dual-core ARM @ 1.40 GHz. Board Model: Often labeled as PB801 or PB819 . Storage: Typically 4GB internal ROM. How to Download CVTE MSD338 512M Software cvte-msd338-512m software download
Official downloads from the manufacturer (CVTE) are usually restricted to OEM partners. However, technicians often use the following sources for "universal" or model-specific firmware: Sites like GoFirmware and DeviceAtlas host various versions