What does it mean when my phone has lines on the screen

Hi Mondayhm,

If you are having an issue with your iPhone's screen having lines on it, I would suggest that you troubleshoot using the steps in this article -

Get help with the screen on your iPhone, iPad, or iPod touch - Apple Support

Specifically -

If you see lines, missing sections, discoloration, or poor image quality

1. Try to restart your device. If you can't restart, reset your device.
2. If restarting or resetting doesn’t fix the issue, restore your device.
3. If you still see the issue after you restore, contact Apple Support.

Thanks for using Apple Support Communities.

Sincerely,

Brett L