T-Mobile has released software update for the Samsung Galaxy S10, the update brings the Night Mode features to the handset, this has been available on the unlocked handset and other carriers previously.
T-Mobile is the last carrier to release this software update for the Samsung Galaxy S10, the update comes with the firmware version G97*U1UEU2ASGB.
The update is apparently available for the Samsung Galaxy S10, Galaxy S10+ and Galaxy S10e, it should be available as an over the air update.
The update also includes Google’s security patch for the month of July, you can check to see if the update is available for you device from the settings menu.
Source Tizen Help