Facebook mobile - method to cancel already sent friend request

This method is for specially facebook mobile users.

Suppose that you've sent a friend request to a wrong person and now want to cancel it but in facebook mobile view there is no option for that.

But I've found a trick that might help in this case. First go to that user's profile.

Now block that user and then unblock that user.

The friend request will be cancelled automatically.

This trick is exculsively from mobile users. Enjoy !!