My iPhone went into diagnostic mode and I don't know how to fix it

Hello jessicafromvictoria,

It sounds like you are not seeing the screen you expect on your iPhone.

Depending on what exactly it is you see on your screen, here are some resources that might help:

• Review If your iPhone, iPad, or iPod touch won't turn on or is frozen if your iPhone won't respond, won't turn on, or gets stuck during start up.

• If you see an icon of a computer with a cable on your screen, check out If you see the Restore screen on your iPhone, iPad, or iPod touch.

• If you have iOS 13 and see an Apple logo, review If your iPhone is stuck on the Apple logo.

• For an Apple logo with the progress bar see Apple logo with progress bar after updating or restoring iPhone, iPad, or iPod touch

Hope this information helps.

Have a good day.