Depending on the door handle design the faceplate may be able to slide completely off.
Take off door handle no screws.
Locate the hole underneath the doorknob shaft.
The door handle will now slide off.
Push the tip of a narrow screwdriver into the hole.
Look for the tiny gap on the side of the door knob.
After applying some pressure you can pull the door knob towards you.
If any screws are exposed during this process remove them to release the lock and remove it from the door.
Apply a bit of pressure to the paper clip to trigger a release button inside the hardware.
Take your flat philips screwdriver and place it in the gap.
Slide the cosmetic faceplate away from the door.
Some styles of door knob will have another thin slot that requires a small screwdriver to free the cover from the door.
Remove door knob without screws.
How to remove a door knob without screws or a latch.
Once triggered the lever or lock trim can be removed from the door.
Straighten a paper clip and insert it into the hole.
You should see a tiny slot or hole.
Turn each screw holding the knob body to the door with a phillips.