Important warning: a new feature for iPhone which is activated by default and which could cost you dearly!
Here is a really important warning if you ever answer yes to the following three points:
- You have an iPhone.
- Your operating system is iOS9.
- You have a limited cellular data plan.
The iOS9 operating system offers a function named WiFi assistance which causes your iPhone to automatically tap into your cellular data when the WiFi signal is weak to allow you to browse the internet smoothly. The intention is good, but when your cellular data plan is limited, you can have a really bad surprise at the end of the month $$$. This setting is enabled by default and that's what is rather questionable ...
Here is how to deactivate this function in three steps: