Download files for your samsung Galaxy S6 Edge Plus SM-G928T (T-Mobile USA) from here and update your device to latest version.
If your S6 Edge plus is dead , softbricked or hardbricked than here we are help you for that.
Here i have posted Samsung Galaxy S6 Edge Plus SM-G928T (T-Mobile Usa) official firmware
stock rom for you to download .
Follow the procedure to unbrick or update your smartphone
Below are the links of firmware file.
Android Version: 6.0.1
Country: USA
Product code: TMB (USA T-Mobile)
PDA: G928TUVS4DPH2
CSC: G928TTMB4DPH2
Please wait for 5 second and then press skip to go to download page.
How To Flash:
Step 1: Download the firmware file and Extract it using Winrar.
Step 2: Download Odin 3.11 or any version and extract it from Here.
Step 3: Download Samsung Usb driver and install from Here.
Step 4: Turn Off your smartphone and make sure its powered off.
Step 5: Now Hold Power Button + Home Button + Volume Down button at the same time.
Your Mobile will start in Download mode and then press volume up.
Step 6: Open Odin and connect your smartphone with a usb cable to computer.
Step 7: Add firmware file to Odin by selecting AP/PDA .
Step 8: Make sure that "re-partition" is unchecked .
Step 9: Finally , click on start button and the flashing process will eventually start. wait for the process to complete .