The 5+ hours are working fine but I just want to know if there is only one 5+ hours per account. My husband and me both have different plans with 5+ hours but if we use one session through my phone, it goes down by one session on his phone too .
Welcome to the community!
It sounds like you are both logging in with the same email and password so you will see the same.
You need to log in with your individual phone number instead you can do it either at the main screen where it asks for the user and password look at the bottom it will say "NOT THE ACCOUNT HOLDER? CONTINUE WITH MOBILE NUMBER" or if already logged in with the email and password go to MORE-> YOUR PROFILE & SETTINGS -> SETTINGS you will see "SIGN IN USING FIDO WIRELESS NUMBER".