Is there a way to get read receipts and typing indicators on my Samsung Galaxy S9 plus?
typically any communication between you and another T-Mobile user whether on iPhone or Android will show you read receipts if you set that option within your Messengers settings within the app.
However with other carrier customers that is up to RCS capabilities enabled by the carrier to work with other carriers.
Retrieving data ...
Manage your T-Mobile account
Use the T-Mobile App or your My T-Mobile account
We're here to help