Firmware Version- 3.16.0 0.9.1 V6031.0 Build 210407 Rel.7370n -tl [2021] File

: Look for Firmware Upgrade in the left-hand sidebar.

Router manufacturers use dense naming conventions to convey system properties. We can break down this specific TP-Link string into five clear indicators:

: This is often due to "Channel Interference." Go to Wireless Settings and change your 5GHz channel to 36, 40, or 44 manually rather than leaving it on "Auto." 💡 Problem: Can't Log In to the Interface : Look for Firmware Upgrade in the left-hand sidebar

As of June 2026, a firmware build from April 2021 is significantly outdated. While the "3.16.0" branch was stable, it may not include security updates against, for example, the recent 2026 regulatory scrutiny surrounding TP-Link devices.

If you aren't sure if you are running this version, follow these steps: While the "3

This is the Rosetta Stone. 210407 follows the YYMMDD convention (2021, April 7th).

: This indicates the software was compiled on April 7, 2021 . : This indicates the software was compiled on April 7, 2021

Some users have reported minor glitches after installing this particular build. Here’s how to resolve them: