SM-G900t Invalid Cert After IMEI Repair

[Bftiedt]

Hey guys, Im trying to repair IMEI on a tmobile s5 model number sm-g900t. After flashing the cert , phone reboots and i get an invalid cert error . Cert is purchased from a reliable vender so I dont think thats the issue. My flashing procedure is as follows..

1. Wipe efs
2. reset MSL
3. Write Cert

I get no errors at all in z3x

below is log file


REPAIR INSTRUCTIONS:
Activate Diagnostic Port:
1. Tap 7 times on 'Build number' in 'Settings'-'About phone' to enable 'Developer options',
go to 'Settings'-'Developer options' and enable 'USB debugging'.
2. Select device in ADB settings.
3. Press 'Activate Diag' button.

Repair IMEI/Serial/BT/WiFi/Product Code:
1. Power on the phone.
2. Type *#0808# and select 'DM+MODEM+ADB'.
3. Reboot phone.
4. Connect USB cable, install drivers if needed.
5. Select Samsung diagnostic port in port settings.
6. Press 'Reset MSL' button to deactivate security.
7. Wait till phone reboot.
8. Tap 7 times on 'Build number' in 'Settings'-'About phone' to enable 'Developer options',
go to 'Settings'-'Developer options' and enable 'USB debugging'.
9. Select device in ADB settings.
10. Fill values what you need to repair.
11. Press 'Repair' button.

Reset EFS, Disable Factory Mode:
Phone must be rooted!
If the software can't root the phone automatically,
then you must root your device manually.
1. Power on the phone.
2. Tap 7 times on 'Build number' in 'Settings'-'About phone' to enable 'Developer options',
go to 'Settings'-'Developer options' and enable 'USB debugging'.
3. Connect the phone to PC with USB cable, install drivers if needed.
4. Select device in ADB settings.
5. Press 'Reset EFS' if you need to reset it.
Be carefully, do not perform this without necessity. Backup will be created automatically.
6. If you have yellow table on your device screen, then press 'Disable Factory Mode' button.

Wipe EFS/NVM:
If you have 'IMEI null/null' or 'Phone baseband unknown' errors,
Then you can try to repair this errors with this function.
1. Power on phone in download mode (turn off phone, hold Volume Down + Home + Power).
2. Connect USB cable, install drivers if needed.
3. Press 'Wipe EFS/NVM' button to deactivate security.
4. Wait till phone reboot.

Operation: Write CERT
Selected model: SM-G900T
Selected port: COM16 SAMSUNG Mobile USB Serial Port
Software version: 25.4

Checking certificate file... OK
KEY ID: 0478
Waiting ADB device... OK
Reading phone info...
Model: SM-G900T
Android version: 5.1.1
Product code: SM-G900TZWATMB
Phone version: G900TUVS1FOJ4
PDA version: G900TUVS1FOJ4
CSC version: G900TTMB1FOJ4
CSC country code: USA
CSC sales code: TMB
HW version: REV1.0
Phone S/N: RV8F50CSMVJ
Modem board: MSM8974PRO
RF cal date: 2014.05.13
IMEI:
Initialization AT RIL... OK
Bypass MSL... OK
Checking for compatible phone and cert... OK
Phone KEY ID: 0478
Writing CERT... OK
Checking CERT status... OK
Rebooting phone... OK

Done with Samsung Tool PRO v.25.4