This firmware version is associated with the router. Device and Version Details Model : TP-Link TL-WR850N Hardware Version : V3 Release Date : April 7, 2021 Build ID : 210407 Rel.7370n How to Manage Your Firmware
Are you experiencing a with this router, or were you just trying to identify the model ? 3.16.0 0.9.1 v6031.0 Build 210407 Rel.7370n (TL-WR850N)
| Component | Value | Meaning | | :--- | :--- | :--- | | | 3.16.0 | Major kernel or RTOS version. Indicates a stable, mature codebase. | | Subsystem Version | 0.9.1 | Likely a wireless stack or hardware abstraction layer (HAL) patch. | | Silicon Revision | v6031.0 | Refers to the specific SoC (System on Chip) stepping, e.g., a Realtek RTL8197 or RTL838x series. The 6031 might denote a reference board design. | | Build Date | 210407 | YyMMdd format: April 7, 2021. This is crucial for cybersecurity (pre/post Log4j, etc.). | | Release Tag | Rel.7370n | Internal QA milestone. The n may indicate a nightly build or network-specific optimizations. | | Variant Suffix | -TL | Most likely TP-Link or a derivative hardware platform. Could also denote "Trunk Line" or "Transmission Layer" in telecom contexts. |
The -TL suffix indicates a customized bootloader and partition table . Unlike generic OpenWRT or DD-WRT builds, this version uses a (128KB bootloader, 2MB for primary fw, 2MB for secondary). This allows for "safe upgrade" – if a new flash fails, the device rolls back automatically.
3.16.0 0.9.1 v6031.0 Build 210407 Rel.7370n -TL ──┬─── ──┬── ───┬─── ─────┬───── ────┬──── ─┬─ │ │ │ │ │ └─ Manufacturer Tag (TP-Link) │ │ │ │ └─ Release Code │ │ │ └─ Release Date (YYMMDD: April 7, 2021) │ │ └─ Sub-version / Regional Hardware Target │ └─ Core File System Version └─ Major Management Engine Version This firmware version is associated with the router
Many ISPs were aggressively deploying IPv6 in 2021. This build refined DHCPv6 and SLAAC handling, fixed prefix delegation issues, and resolved conflicts with PPPoE connections.
A: Yes, under Network > IPTV, you can set VLAN ID (e.g., 10 for IGMP proxying). This feature was refined in Build 210407.
The leading 3.16.0 typically refers to the provided by the chipset manufacturer (often Qualcomm, MediaTek, or Broadcom). In this context:
and the TP-Link Community Forums, this firmware explicitly pairs with the hardware revision. Hardware Spec Wi-Fi Standard Wi-Fi 4 (802.11n) Max Wireless Speed Up to 300 Mbps (on 2.4 GHz band) Physical Ports 1 × 10/100Mbps WAN Port; 4 × 10/100Mbps LAN Ports Antennas 2 × Fixed Omni-Directional Antennas Key Features Indicates a stable, mature codebase
Click “Upgrade.” A warning will appear – confirm. The router will upload the file and begin flashing. Do not power off, refresh the page, or disconnect the Ethernet cable during this time. The progress bar may take 3–5 minutes.
If you have spotted this string in your administrative console, you are likely using a networking device from (the "-TL" suffix is a strong indicator of TP-Link hardware), possibly from the Archer series (such as the C6, C7, A7, or similar AC1200/AC1900 class routers) or a Deco mesh unit. This article will dissect every component of this version number, explain what it means for your network, and guide you on whether you should update, downgrade, or stay put.
Or broken down:
Some users have reported minor glitches after installing this particular build. Here’s how to resolve them: The 6031 might denote a reference board design
: The compile date of this firmware, written in YYMMDD format. This specific build was finalized on April 7, 2021 .
Is this a you bought yourself, or was it provided by your ISP ?
Because this hardware relies on the 2.4 GHz wireless spectrum and utilizes 10/100 Fast Ethernet ports rather than Gigabit infrastructure, this 2021 firmware build focuses primarily on stability, lightweight memory utilization, and cross-device compatibility. Technical Features Managed by Build 210407
Firmware updates from this period frequently addressed 2.4 GHz interference problems, band steering glitches, and occasional 5 GHz dropouts. Users upgrading to often report reduced latency spikes and improved roaming for mesh nodes.