You can do it from your phone but its not a very efficient way to do it.... go to your browser and log in to facebook, then in the More column select Desktop Site, then this gives you the computer style version so if you then go to your profile page and upload photos you can select any image within your phone from the list but it doesn't give you thumbnails so you kind of need to know the image file names. Told you it was a bit long winded!