Mint app provides most of the online account management features in the app including plan changes, one time data adds, order replacement SIM. I haven’t seen any options either in the app or online to look at call or text logs.
You can see your data usage in the app . You also get a text when 80% data has been used. I have never fully run out of data, so I don’t know if there are any additional notifications as the data runs out. There is no option for a one-touch data-freeze widget or other ways to turn off cellular data on demand within the app.
If you have multiple phones with Mint, you can opt for their family plan which allows you to pay for their annual plan (best effective monthly rate) in quarterly installments. Primary account holder can make plan changes for other accounts on the family. All other account management has to be done in individual accounts, like getting a replacement sim or requesting a new esim for new phone, etc.
The primary account holder can see family members’ individual data usage and gets the 80% data used notification for all phones in the family.