Not a problem.
Create a document
Fill the background with white.
Set two guides to the center of the document.
Select your
Pen Tool. Set to path.
Create a new layer.
Starting at the top of the phone begin drawing the phone.
End where you started.
When the Path is closed, right click and choose 'make a selection'.
You will now have a selection.
Fill the selection with black (you can always change it later).
Hit Cmd/cntrl + D to deselect.
Duplicate the half phone layer.
Highlight the duplicated layer, then Go to EDIT > TRANSFORM > FLIP HORIZONTAL.
Select your move tool and move the duplicated phone half into position.
You can now highlight the two phone half layers, duplicate them, then merge them.