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Oppo and vivo announce Dual Wi-Fi for their flagships - GSMArena.com news
What Is Dual-Band Wireless Networking?
Amazon.com: Eightwood Dual WiFi Antenna with RP-SMA Male Connector, 2.4GHz 5GHz Dual Band Antenna Magnetic Base for PCI-E WiFi Network Card USB WiFi Adapter Wireless Router : Electronics
Amazon.com: WiFi Extender 1200 Mbps-2.4 and 5GHz Dual-Band Network-Wireless Amplifier Signal Booster-Wireless Repeater with Smart Signal Indicator : Electronics