Move the extracted file directly to the root directory of your USB drive (do not put it in a folder). Update Process: Turn off the TV and unplug the power cord. Insert the USB drive into the TV's USB port.
This is the stock firmware for the Cobia 55-inch Smart UHD TV. It is typically used for fixing software hangs, boot loops (stuck on logo), or resolving issues with the internal apps. Download MS3458 U801 3840x2160 Cobia CLEDTV5517UHD rar
Download the .rar file and extract the contents. You should see a file typically named allupgrade_ms3458_sos.bin (or similar). Move the extracted file directly to the root
Press and hold the on the TV panel (not the remote). While holding the button, plug the power cord back in. This is the stock firmware for the Cobia
Do you have the (found on a sticker inside the TV) to ensure this version is a perfect match for your hardware?
Use a 4GB or 8GB USB drive and format it to FAT32 .
Below is a template for a forum or blog post designed to help others find or share this specific 4K firmware package.