From the article:
Here’s how to disable “WiFi-Assist”:
- Go to Settings
- Click Cellular
- Scroll all the way to the bottom and disable Wi-Fi Assist. If the slider is not green anymore, the feature is disabled and you are safe once again.
This is a rather deceptive move from Apple and one that will no doubt cause some headaches and financial troubles for unsuspecting iPhone users who have upgraded to iOS9.
Basically, if you leave this setting on when you upgrade, your iPhone will automatically switch to cellular data if a WiFi signal is lost. As you might guess, this could lead to some monumental data usage amounts – and bills – if you’re doing any kind of video streaming or listening to music online.
So, just a friendly heads-up today to make sure to turn off WiFi Assist on your iPhone!
Have a great day.