To set up bill reminders, you can follow these steps:

1. Log in to My T-Mobile as the Primary Account Holder.
2. Navigate to Bill & pay from the homepage or the navigation menu.
3. Select Paperless Billing under the billing options.
4. Choose your preferred delivery method for the paperless bill:
Email
Text message
5. Agree & Submit your preferences.

This will ensure you receive reminders when your bill is ready! Can you try the steps above, please?