H820t‑W Router — Hardware Revisions & Firmware Compatibility
The H820t-W has been produced in three hardware revisions. Each revision uses a different platform and supports a specific firmware series. Installing firmware from an incompatible series can damage or brick the device. Use this guide to identify your unit before downloading or applying firmware.
Revision summary
| Revision | Production window | Wi-Fi antennas | Platform / RAM / Flash | Firmware series |
|---|---|---|---|---|
| 1 | Before Jan 2023 | 1× | RT5350 | H820-RT5350-v3.2.x only |
| 2 | Jan 2023 – Jan 2026 | 2× | MT7628 / 64 MB RAM / 16 MB Flash | H820-7628-v3.3.x only |
| 3 | From Jan 2026 | 2× | MT7628 / 128 MB RAM / 16 MB Flash | H820-7628-v3.3.x or H820-7628-v5.10.x |
Identifying your revision
Check the part number label on the underside of the router:
Revision 3 — H820t-W-v3 (from Jan 2026)
- Part number shows H820t-W-v3, or
- Part number shows H820t-W with RAM:128MB printed on the line below (early production batches)
- Has 2× Wi-Fi antenna connectors
- Supports both H820-7628-v3.3.x and H820-7628-v5.10.x — can be freely upgraded or downgraded between these series. The v5.10.x series is recommended as it includes additional features including WireGuard VPN.
Revision 2 — H820t-W (Jan 2023 – Jan 2026)
- Part number shows H820t-W with no version suffix and no RAM line on the label
- Has 2× Wi-Fi antenna connectors on the side of the unit — this is the key physical identifier
- 64 MB RAM / 16 MB Flash
- Supports H820-7628-v3.3.x only — cannot be upgraded to v5.10.x
Revision 1 — H820t-W (before Jan 2023)
- Part number shows H820t-W
- Has 1× Wi-Fi antenna connector — this is the key physical identifier
- Supports H820-RT5350-v3.2.x only — cannot be upgraded to v3.3.x or v5.10.x
Warning: Do not attempt to apply v3.3.x or v5.10.x firmware to a Revision 1 unit, or v5.10.x firmware to a Revision 2 unit. The hardware is not compatible and doing so can brick the device. If you are unsure of your revision, contact Proroute support before proceeding.
Applicable part numbers
All three variants of the H820 4G router — H820t-W, H820t-W-v3, and H820t-W-G-RS485 — use the same firmware series for their respective revision. The RS485 variant follows the same revision and firmware compatibility rules as the standard H820t-W.
Firmware upgrade
Once you have confirmed the correct firmware series for your revision, follow the standard upgrade procedure. See Firmware Upgrade Process for step-by-step instructions.
Download links for each firmware series are available on the Proroute firmware selector page. Ensure you select the correct series for your hardware revision.