where to register for case update notification(email or Text) ?

[alt2017]

after filing N400, Can anyone advise which website is used for case update notification(email or Text message )? i am confused as my email didnt receive any case update email notification yet except the initial submission confirmation,  i had to login manually to review the PDF letter,such as Biometrics letter issued yesterday. Neither my spouse nor i had received email notification.

1. http://elis2.uscis.dhs.gov  ---this is the site where  i e-filed N400.
2. https://my.uscis.gov/account/  --- i can login with the same account at elis and have the fastest update ,such as it already has the PDF letter for biometrics appt, while the other two websites didnt have any update except the receipt.
3. https://egov.uscis.gov  -- account registered  differently from the elis account. but it didnt email me the notification even i already read my letter from the site#2.

please advise which site will be the commonly used for case notification. i dont want to login to check status every day,especially for interview letter during months long waiting period. 

[jkolati]

Here is what I did. I have registered in https://egov.uscis.gov/ and added my N-400 receipt#. There are check boxes for email and text message updates. However my case status in this site still shows as application received and receipt notice was mailed but in reality I have completed my biometrics too which is not reflecting in this site. I think you already did that.