One of the defects in the IPhone 6 is the phone's disability to distinguish between weak and strong Wi-Fi signal.
For example, in many cases, the phone captures Wi-Fi, located in the homes of its users, despite their weakness or abnormality, and the user is forced to access to the phone settings and click on Turn Off Wi-Fi button.
To solve this problem, Apple IOS 9 provided the feature "Wi-Fi Assist" mission to prevent the phone from picking up any weak Wi-Fi signal, and convert it directly to the 3G package, if any.
The problem is that in Lebanon, the Internet is always weak, and so when the Wi-Fi at home or restaurants or public places is weak, IPhone directly converts to 3g and therefore the consumption of internet will be taken from the 3G package.