Wi-Fi – how much of this sound… I Think everyone knows about the wireless connection, which operates at frequencies of 2.4 GHz and 5 GHz. Many modern routers have the ability to create two network for more reliable and stable connection. The 5 GHz band has several advantages, and iOS 11 began to take this into account.
The new operating system Apple at automatic connection to wireless networks prefers the 5 GHz band. If your iPhone or iPad are in the range of the networks 2.4 GHz and 5 GHz, the device choose the latest.
In previous versions, including iOS 10 operating system by default, connected to networks of 2.4 GHz. IOS 11, the situation changed. This is the explanation: the 2.4 GHz wireless signal more susceptible to interference. The network has fewer features when you select a channel than when using the 5 GHz band: only three of them do not intersect with each other at the time, as the frequency of 5 GHz has 23 non-overlapping channels.
A change in iOS 11, as conceived by Apple, was designed to improve the stability and reliability of wireless connectivity on mobile devices. At the same time, in some situations, this may lead to the opposite consequences.
The main difference between 2.4 GHz and 5 GHz is the range of the signal. In the first case, it is transmitted at a greater distance and is less affected by concrete structure and floors. This is due to the main characteristics of the wave and is mainly due to the fact that when high frequency waves are damped faster.
Thus, if an iOS user 11 increasingly concerned about the coverage areas, it should force the switch to the network with a frequency of 2.4 GHz.