1. Latest official firmware downloads for TYT-MD-380, MD-390, MD-380G, and MD-390G:
Index of /Firmware/Tyt
The image below shows the latest version, which has been tested and confirmed to be working.

II. Official firmware download addresses for TYT-MD-UV380/390 and TYT-MD-UV380plus/390plus
https://github.com/notzaleewa/TYT_MD-UV3X0_firmware

Here's the download link from Baidu Cloud.
: https://pan.baidu.com/s/16tDQ9whP8lnpI0
9mWIxjUg?pwd=ji43
Extracted: ji43
III. Version Information:
Firmware markings
V - Non-GPS version with 100,000 contacts
D - Non-GPS version with 10,000 contact entries and a recording function.
P - GPS version with 100,000 contacts
S - GPS version with 10,000 contacts and recording functionality
Firmware identification instructions:
V - No GPS functionality, contact capacity of 100,000 entries
D - No GPS functionality, with a contact capacity of 10,000 entries and recording capabilities.
P - Features GPS functionality and supports 100,000 contacts.
S – Features GPS functionality, with a contact capacity of 10,000 entries, and includes recording capabilities.