Xiaomi Mi Router 4A: OpenWrt Compatibility Report
The Xiaomi Mi Router 4A runs OpenWrt 25.12.2 on the ramips/mt7621 target, and has been supported since 23.05.0. Its WiFi 5 (AC) wireless on the mt76 driver rates good for open-source driver support (0.80/1.0), installation is rated moderate, and it is still sold new.
Hardware data and retail listings last checked .
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Specifications
| SoC | MediaTek MT7621AT |
|---|---|
| CPU | 2 cores @ 880 MHz |
| RAM | 128 MB |
| Flash | 16 MB |
| Ethernet ports | 3 |
| WiFi generation | WiFi 5 (AC) |
| Radios | 2.4GHz: b/g/n · 5GHz: a/n/ac |
| WLAN hardware | MediaTek MT7603E, MediaTek MT7663 |
| WLAN driver | mt76 |
| OpenWrt target | ramips / mt7621 |
| Package architecture | mipsel_24kc |
| Current release | 25.12.2 |
| Supported since | 23.05.0 |
| Install method | see git-commit |
| Install difficulty | moderate |
| Power supply | 12V/1A via barrel plug |
| Device type | Home router |
| Estimated throughput | 220 Mbps |
| Availability | available |
Installing OpenWrt on the Mi Router 4A
Installation on this device is rated moderate. Expect to use a recovery mode, TFTP or a vendor tool rather than a plain web upload. Documented methods: see git-commit.
Flashing third-party firmware can brick a router and usually voids the warranty. Always check that the firmware image matches your exact hardware version.
Hardware versions
The Mi Router 4A ships in several hardware revisions with different chipsets. Match the version printed on your device label before flashing.
| Version | Target | Current release | WLAN hardware |
|---|---|---|---|
| MIR4A/GBIT/V2 shown above | ramips/mt7621 | 25.12.2 | MediaTek MT7603E, MediaTek MT7663 |
| GBIT | ramips/mt7621 | 25.12.2 | MediaTek MT7603E, MediaTek MT7612E |
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