Setup and modify the R6220 wireless settings | Answer | NETGEAR Support
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NETGEAR R6220-100NAS AC1200 Smart Wi-Fi Dual Band Router with External Antennas - Newegg.com
Modified Netgear R6220 Ac1200, i tried to add 2 Additional antennas to my netgear router but i have not seen and change in WiFi strength any suggestions : r/openwrt