Suddenly the iPhone font size become bigger. How to resolve it?

Hi

The following steps may help:

Go to: Settings > General > Accessibility > Larger Text:

• Turn off Larger Accessibility Sizes.
• Or adjust the slider to choose a different reading size.

If Zoom has been enabled on your iPhone, it may help to:

• Double-tap the screen with three fingers.
• Triple-click the Home button.

To turn off Zoom:

Go to: Settings > General > Accessibility > Zoom > turn off Zoom.

To check and, if necessary, turn off the Accessibility Shortcut for Zoom:

Go to: Settings > General > Accessibility > Accessibility Shortcut (at the very bottom) > deselect Zoom.