Xiaomi Mi Router 4A (R4AC): OpenWrt Compatibility Report
The Xiaomi Mi Router 4A (R4AC) runs OpenWrt 25.12.2 on the ramips/mt76x8 target, and has been supported since 24.10.0. Its WiFi 5 (AC) wireless on the mt76 driver rates fair for open-source driver support (0.65/1.0), installation is rated moderate, and it is still sold new.
Hardware data and retail listings last checked .
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Specifications
| SoC | MediaTek MT7628DAN |
|---|---|
| CPU | 1 core @ 575 MHz |
| RAM | 64 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 MT7628DAN, MediaTek MT7615 |
| WLAN driver | mt76 |
| OpenWrt target | ramips / mt76x8 |
| Package architecture | mipsel_24kc |
| Current release | 25.12.2 |
| Supported since | 24.10.0 |
| Install method | see git-commit |
| Install difficulty | moderate |
| Power supply | 12 VDC, 1.0 A |
| Device type | Home router |
| Estimated throughput | 71 Mbps |
| Availability | available |
Installing OpenWrt on the Mi Router 4A (R4AC)
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.
Official OpenWrt device page for the Mi Router 4A (R4AC)
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 (R4AC) ships in several hardware revisions with different chipsets. Match the version printed on your device label before flashing.
| Version | Target | Current release | WLAN hardware |
|---|---|---|---|
| 100M/INTERNATIONAL/V2 shown above | ramips/mt76x8 | 25.12.2 | MediaTek MT7628DAN, MediaTek MT7615 |
| xiaomi_r4ac_international_100m | ramips/mt76x8 | 25.12.2 | MediaTek MT7628DAN, MediaTek MT7612EN |
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