Start by checking the Micromax Official Support page or their Android TV system update section for OTA updates.
Because firmware for this model is frequently split into multiple parts (like part01.rar , part02.rar ), you must download to the same folder before extracting.
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Turn off the TV, insert the USB drive, and then hold the Power button on the TV (not the remote) while plugging it back in until the "Software Updating" screen appears.
Use a tool like WinRAR or 7-Zip to extract the .bin or .img file from the joined archive. Start by checking the Micromax Official Support page
often requires checking third-party community forums or dedicated firmware repositories, as official direct download links for legacy TV models are rarely maintained on the primary manufacturer site.
Format a USB flash drive to FAT32 and copy the firmware file directly to the root directory (do not put it in a folder). Initiate Update: Download for RE305 V4
Do not turn off the power during the upgrade, as this may permanently brick the product.