Recovering lost Vodafone login details is quick and easy, even if you can't remember the email address you used to register your account. Providing you know what your mobile number is, you can still access your Vodafone account, and from there, can change your username and password to something more memorable.
Visit the Vodafone website (see Resources) and click the "Log in to My account" button at the top right of the screen.
Enter your username (which is usually the email address you registered with) and password to sign in here. If you don't remember them, click "Forgotten your password or username."
Enter your mobile number. You should receive a text message containing a temporary username and password within a couple of minutes. Use this information to log in.
If you can't remember your phone number, enter "*#100#" using your phone keypad and press "send." Your phone number will be displayed on-screen.