Q:"Every time I leave the house, I always turn off WiFi on my iPhone as a security measure. But this time iPhone cellular data not working issue occurs while turning WiFi off, which hasn't happened before. I guess there is something wrong with my iPhone. Thus, I try rebooting the iPhone but it seems to be useless. Is there any other way to address the problem? If you have any idea, please let me know. Thank you sincerely!" - Bunny

Data connection is very essential for mobile phone users. It is because WiFi can't be connected anywhere and whenever. You may be anxious when you turn on cellular data but you still can't access the internet or transmit any data on your iPhone. If you are being disturbed by such a problem, the following tips outlined will help you out.