While specific "latest" version numbers can vary by region, recent updates for related TCL Android TV platforms (such as the RT51 chassis often found in this series) have moved toward version or newer to improve system stability. In 2026, TCL has begun rolling out major system updates, including Android 14 for some Google TV models, though the 50EP660 primarily receives updates focused on security and performance. How to Update Your Firmware You can update the TCL 50EP660 through two primary methods: How can I update the software of the TV? - TCL
If you encounter persistent issues after a firmware update that a factory reset does not solve, contact with your exact build number, serial number, and purchase proof. They may provide a specialized firmware patch. Firmware TCL 50EP660
If a "Service Update" is available, run that after the main system update to ensure TV tuner features are also current. Method B: USB Local Update (The Advanced Way) While specific "latest" version numbers can vary by
: The firmware supports a wide range of multimedia decoding, including H.265 (HEVC) , ensuring smooth playback from external USB drives. Common Issues & Limitations Audio/Video Sync : Users sometimes report audio delay issues - TCL If you encounter persistent issues after