like i've said i tried those
1) Relax and quit panicking...
2) Do you know how to go into Download mode?
3) Goto:
http://www.sammobile.com/firmwares/ enter your model in the search box there. Choose the latest FW.
4) Follow these directions:
Model: SM-G900T
Model name: GALAXY S5
Country: USA (T-Mobile)
Version: Android 4.4.2
Changelist: 2271722
Build date: Mon, 25 Aug 2014 11:13:33 +0000
Product Code: TMB
PDA: G900TUVU1BNG4
CSC: G900TTMB1BNG4
MODEM: G900TUVU1BNG4
Instructions
Extract (unzip) the firmware file
Download Odin v3.09
Extract Odin zip-file
Open Odin v3.09
Reboot phone in Download Mode (press and hold Home + Power + Volume Down buttons)
Connect phone and wait until you get a blue sign in Odin
Add the firmware file to AP / PDA
Make sure re-partition is NOT ticked
Click the start button, sit back and wait a few minutes
5) If that doesn't work take it back to Tmobile and tell them it is defective. You have a year warranty.
6) If you are stuck or have tried every single method like you said you did then try responding to those specific threads for specific help. *****ing, moaning, and getting offended like a 12 year old is not gonna get you anywhere. The people on XDA are probably the most helpful people u can find when it comes to your problem. You are asking for FREE help...
Last but not least... Welcome to the internets; nobody cares....