It's dual-frequency.
The iphonex supports dual-band wifi, dual-band WiFi, refers to the digital electronic products support 2.4GHz\/5GHz dual-band signal, support includes 802.11a\/b\/g\/n complete wireless network.
The iPhone XR is a mobile phone product released by Apple at 01:00 am Beijing time on September 13, 2018 (10:00 am California time on September 12, 2018) at the Steve Jobs Theater on the Apple campus in SAN Jose. So the iPhone EXR is dual-band WiFi.
1. Dual-band WiFi. 2. Because iPhone XR supports WiFi connection in two bands of 2.4GHz and 5GHz, it can automatically select the best frequency band for connection according to the network environment, providing a more stable and fast network experience. The advantage of dual-band WiFi is that it can avoid band congestion and interference, provide higher transmission speed and stability, and also adapt to different network environments, so that users can better enjoy network services.