my phone has a picture of a lock on it in the upper right hand corner

JUDYPIERSOL wrote:

My phone has a picture of a lock with and arrow around it, on it in the upper right hand corner of the screen to the left of the battery symbol . What does this mean.

Use Control Center on your iPhone, iPad, and iPod touch - Apple Support

It means your iPhone using portrait screen lock.

Try here > If the screen doesn't rotate on your iPhone, iPad, or iPod touch - Apple Support

You locked screen rotation. Try changing the physical button above volume controls. You can also access it via Control Center (slide from bottom of phone screen up).