need to fix base bande /imei G925t

Dear

need to fix base bande & imei on g925t laste security 2018
any solution ....???
try by full firmware ...this is the log:

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Chimera Version Mobile Phone Utility : 17.01.1125 @ 2018-04-10

Printing phone history

SW Change
09/04/2018
22:55:11

SW Change
09/04/2018
21:37:52

SW Change
09/04/2018
21:31:37

SW Change
09/04/2018
18:45:57

SW Change
09/04/2018
18:44:34


 Your license is going to expire soon (3 day(s) left), if you want to extend it click here, or if you want to buy a new one, here.

[Firmware update started]
Selected model: SM-G925T

Processing firmware...

Flashing firmware...
Waiting for download mode.
Connecting.
SBL Info: Modèle: SM-G925T, Region: USA, Provider: TMO, PDA: G925TUVS6FRC1
Valid PIT file can be found in the firmware: ZEROLTE_USA_TMO.pit
Use the "Enable PIT Write" option if you want to use it.
Reading PIT from phone.
Checking firmware compatibility.
RP SWREV: B:6 K:3 S:4
Downgrade: sboot.bin (6 -> 5)
Downgrade: cm.bin (6 -> 5)
Flashing boot.img
Flashing recovery.img
Flashing system.img
Flashing userdata.img
Flashing sboot.bin
The firmware downgrade may not be allowed.
Firmware Flash échoué.
Finished at local time: [04.10.18 00:59:16]
WorkID: 36055568
 Your license is going to expire soon (3 days left), if you want to extend it click here, or if you want to buy a new one here.
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need file efs cert ans full rom