The software environment on this board is typically built on Android 9.0
Some technicians share direct links in comments, though these should be used with caution. Technical Demo & Info on YouTube Firmware Download Post on Instagram 🛠️ How to Install (USB Upgrade) Format a USB Drive: Use a 4GB or 8GB drive formatted to Copy the File: Place the firmware file (usually named allupgrade_518_sos.bin or similar) into the root directory of the USB. Boot to Upgrade: Turn off the TV. Insert the USB drive into the TV's USB port. Power button tp.sk518d.pb802 software download
Used for standard updates or fixing software glitches. The file is usually named allupgrade_518_4G_1G.pkg or similar. Full Dump (eMMC/NAND): The software environment on this board is typically