The reason they have lack of users is because they did not keep up with the development of technology. Who wants Symbian if it is dying? They were their own worst enemy. They caused the loss of their users. iOS took it with their innovation and Android is slowly but surely doing the same from them and iOS. If you want to keep a user/client, then you better make it worth their while to stay on.
Android did not let patents stop them from evolving and development. And come to think of it, the only reason why Nokia isn't being sued by Apple is because they are not a real threat now.
EDIT: I am not an Apple fanboy!!!!!!!!!!!!!!!!!!!!!!!!!!!!!