H820t‑W Router — Hardware Revisions & Firmware Compatibility
| Revision | Hardware window | WIFI Antennas | Platform / RAM / Flash | Supported firmware series | Cross‑series upgrade? | Notes |
|---|---|---|---|---|---|---|
| 1 | Before Jan 2023 | 1 | RT5350 platform | H820‑RT5350‑v3.2.x | No | First hardware generation. Stays on v3.2.x. |
| 2 | Jan 2023 – Jan 2026 | 2 | MT7628 / 64 MB RAM / 16 MB Flash | H820‑7628‑v3.3.x | No | More powerful CPU, but not compatible with v5.10.x series. |
| 3 | From Oct 2026 onward | 2 | MT7628 / 128 MB RAM / 16 MB Flash | H820‑7628‑v5.10.x and H820‑7628‑v3.3.x | Yes (both directions) | Recommended: H820‑7628‑v5.10.x (adds features such as WireGuard VPN). |
Pre January 2023, the H820t-W hardware was using 1x WIFI antenna. This unit uses firmware series H820-RT5350-v3.2.x . This version cannot be upgraded to later firmware series.
January 2023 - January 2026, the H820t-W hardware has 2x WIFI antennas, the router runs on a more powerful processor with 64MB RAM and 16MB FLASH. The device runs firmware H820-7628-v3.3.x . This version cannot be upgraded to later firmware series H820-7628-v5.10.x .
October 2026 onwards, the H820t-W hardware has 2x WIFI antennas, the devices have increased 128MB RAM and 16MB FLASH. The device runs firmware H820-7628-v3.3.x or H820-7628-v5.10.x . The router can be upgraded/downgraded to either firmware series. It is advised to use the latest H820-7628-v5.10.x, which has the latest features such as support for Wireguard VPN.