IOS 9 independently disables the Wi-Fi when a weak signal

One of the most annoying features of Wi-Fi - a long download content with a weak signal. Sometimes it does not clear, loading or not, although the connection seems to be there. This happens when an access point is far away for fast data transfer or in case of heavy load, but the smart phone still clings signal. The new iOS 9 of this scenario can be avoided.

The new feature is called Wi-Fi Assist and was introduced in the update iOS 5 beta 9 for developers. Accordingly, it appeared in the final version of the system. Its mission is as follows: the system will automatically turn off Wi-Fi, if the signal is too weak for normal data download. Instead, iOS will activate the mobile Internet. If the Wi-Fi signal will return to an acceptable level, the system will switch back automatically.

Similar to the switch does not become an unpleasant surprise for the user in the form of large bills for mobile internet payment, "Help with Wi-Fi» You must activate manual mode. This can be done in the "Settings" section - "Cellular", at the bottom after the applications of statistics.

(via)