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A: You tried to install a beta firmware on a locked bootloader TV. You must use the "M999" Test versions specifically designed for your region.
A: Partially. Roku TCLs (models starting with 3, 4, 5, 6 series) use Roku OS, not Android. You cannot flash Android firmware on a Roku TV. For Roku, go to Settings > System > System update > Check now. Download Tcl Firmware For All Models
Last Updated: October 2024