Thank you for posting this in the answers forums! I'm sorry to hear you are having trouble logging in to your account via samsung galaxy s3. If it is not allowing you to login, the email or password must be incorrect.
Could you try logging out of you computer and logging back in to see if that works? If it does not, there is a way to reset your password. If it tells you the email or password is incorrect, below is a forgot password? reset. option. You will just need to enter your email and it will provide you with the steps to reset your password.
Hope this helps!
The Sling Moderation Team