How can I manage the number under my account?

Click on ‘Account Settings’ / ‘Manage SIMS’

Managing your account
What will I find in my home page ?
How can I change my password?
How can I login to my account?
How Can i change my email address?
Why doesn’t my email address work when I login for the first time?
How can I manage my account settings?
What happens if I forgot my password?