Never download firmware from BitTorrent or random Google Drive links shared in Reddit threads. There is no quality control.
: Download the latest firmware file from the repository above and unzip it if necessary. Connection : Always use a wired Ethernet connection dsl3890 firmware link
Do not trust random "firmware aggregator" websites. Here is the official hierarchy of safe sources: Never download firmware from BitTorrent or random Google
Do not interrupt the process. If the power goes out during a firmware update, the router may become unusable. the router may become unusable.