tagarista89:

Device : Newifi D2 with MT7621,MT7603E (2.4 ghz wifi) and MT76x2E.
Version installed : Openwrt 19.07.07

On System log :
Thu Apr 29 05:58:09 2021 kern.info kernel: [27563.371343] ieee80211 phy1: Hardware restart was requested
Thu Apr 29 06:04:09 2021 kern.info kernel: [27923.427600] mt76x2e 0000:01:00.0: Firmware Version: 0.0.00
Thu Apr 29 06:04:09 2021 kern.info kernel: [27923.433086] mt76x2e 0000:01:00.0: Build: 1
Thu Apr 29 06:04:09 2021 kern.info kernel: [27923.437240] mt76x2e 0000:01:00.0: Build Time: 201507311614____
Thu Apr 29 06:04:09 2021 kern.info kernel: [27923.465964] mt76x2e 0000:01:00.0: Firmware running!

Test Ping :
ping google.it
64 bytes from par10s42-in-f3.1e100.net (216.58.214.163): icmp_seq=190 ttl=116 time=31.7 ms
64 bytes from par10s42-in-f3.1e100.net (216.58.214.163): icmp_seq=191 ttl=116 time=31.4 ms
64 bytes from par10s42-in-f3.1e100.net (216.58.214.163): icmp_seq=192 ttl=116 time=31.6 ms
64 bytes from par10s42-in-f3.1e100.net (216.58.214.163): icmp_seq=193 ttl=116 time=31.6 ms
64 bytes from par10s42-in-f3.1e100.net (216.58.214.163): icmp_seq=194 ttl=116 time=31.7 ms
64 bytes from par10s42-in-f3.1e100.net (216.58.214.163): icmp_seq=195 ttl=116 time=31.9 ms
64 bytes from par10s42-in-f3.1e100.net (216.58.214.163): icmp_seq=196 ttl=116 time=31.7 ms
From n-batnic (192.168.1.131) icmp_seq=198 Destination Host Unreachable
From n-batnic (192.168.1.131) icmp_seq=199 Destination Host Unreachable
From n-batnic (192.168.1.131) icmp_seq=200 Destination Host Unreachable
From n-batnic (192.168.1.131) icmp_seq=201 Destination Host Unreachable
From n-batnic (192.168.1.131) icmp_seq=202 Destination Host Unreachable
From n-batnic (192.168.1.131) icmp_seq=203 Destination Host Unreachable
From n-batnic (192.168.1.131) icmp_seq=204 Destination Host Unreachable
From n-batnic (192.168.1.131) icmp_seq=205 Destination Host Unreachable
From n-batnic (192.168.1.131) icmp_seq=206 Destination Host Unreachable
64 bytes from mad01s26-in-f3.1e100.net (216.58.214.163): icmp_seq=207 ttl=116 time=31.8 ms
64 bytes from mad01s26-in-f163.1e100.net (216.58.214.163): icmp_seq=208 ttl=116 time=32.2 ms
64 bytes from mad01s26-in-f163.1e100.net (216.58.214.163): icmp_seq=209 ttl=116 time=31.7 ms
64 bytes from mad01s26-in-f163.1e100.net (216.58.214.163): icmp_seq=210 ttl=116 time=32.3 ms

Wifi 5ghz settings :
config wifi-device 'radio1'
option type 'mac80211'
option hwmode '11a'
option path 'pci0000:00/0000:00:00.0/0000:01:00.0'
option htmode 'VHT80'
option country 'IT'
option channel '100'

With wifi 2.4ghz i don't have problem.

Could you help me for to fix the problem?

Regards