If you have jailbroken iOS 10 device you can display Wi-Fi channel in the Status Bar on iPhone with the new Cydia release called WifiChannelBar. As you know all modern wireless routers utilizes between 2.4GHz and 5 GHz for signal transmission to feed internet data to your wireless devices. It can be real challenge to figure out what channel you’re using from your iPhone. To do it you'll need to install an app or to get access to the router’s wireless settings.
WifiChannelBar tweak developed by Jeremy Kister offers an easy way to view Wi-Fi channel that your network is utilizing by displaying it right next to the Wi-Fi icon in your Status Bar.
Wi-Fi channel is helpful for those users who configure their Wi-Fi networks to improve performance by using non-overlapping channels. Such channel reduces interference from surrounding networks and helps you maintain your internet speed over a wireless connection on your device. So it is essential to select the proper channel.
So to display Wi-Fi channel in the Status Bar on your iPhone head over to Cydia’s BigBoss repo and search for WifiChannelBar tweak. It is available as a free download package and supports jailbroken iOS 10 devices.
WifiChannelBar doesn’t come with any options to configure. The tweak reveals whether your iPhone is using the 2.4GHz or 5GHz Wi-Fi band of your router. For example, when you see such channels as: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, or 11 this means know you’re using the 2.4GHz band. If you see anything else, then you’re using the 5GHz band. So once the tweak is installed, this channel info will be shown in the Status Bar. If you don't want the tweak to display this info anymore, just uninstall it.
WifiChannelBar tweak brings you an useful details about what channel your connected network is operating on. As for me I'm find this tweak useful as configure Wi-Fi networks for better performance.