I use two, versions 9 and 13. Versions are indicated on the sticker below. The case when newer is worse. From the 13th revision, we switched to Mediatek chips and this is a nightmare - the devices are buggy, they freeze several times a day. The 9th version was easily flashed through the interface on DD-wrt, later on OpenWRt and began to work more stable, the 13th is sewn with OpenWRt tambourines, there is no DD-wrt on it, and there is no point in sewing, the iron itself is crooked, like other routers on MT7628N. After playing with firmware, I left v9 as a router, for stability, I turned on v13 as a repeater. By the way, in the latest official firmware there is no bridge mode, the repeater mode is responsible for it - it distributes both by wire and via WiFi, the network name can be made different from the mother one. And yes, the speeds in bridge mode are about half that of the provider on the wire, i. E. although it was announced for v9 150mb/s and v13 300mb/s, up to 50 came out on the bridge (on wire 100)
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