S6 Edge+ (G928) t-mobile Downgrade problem - T-Mobile Samsung Galaxy S6 Edge+

Hi,
My cell g928t on MM6 got frp, and all methods fail, now i want to downgrade to 5.11, but when i try to flash (G928TUVU1BOH4_G928TTMB1BOH4_G928TUVU1BOH4_HOME.tar) it, i get error
"SW REV CHECK FAIL "
what to do? how to downgrade
any help plz?

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hi. i bought a cheap G928T of somebody (30$) with software problem.
the phone is g928t. and the previous owner (dont know what he was trying to do) installed G928F firmware UK BTU.
now the phone cant read sim card (null) (baseband unknown)
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kodex99 said:
hi. i bought a cheap G928T of somebody (30$) with software problem.
the phone is g928t. and the previous owner (dont know what he was trying to do) installed G928F firmware UK BTU.
now the phone cant read sim card (null) (baseband unknown)
i tried flashing g928t firmware 5.1.1 (PAC), tried using TMO Pit, tried custom firwmare then stock. Nothing working.
tried flashing from 7.0 BTU UK to 6.0.1 or 5.1.1 UK BTU but odin error device 3 binary 2
tried downgrading and nothing happened.
is there anything else i can do to install back the g928t firmware back ?
its showing g928F instead of T. Please help
thanks
Click to expand...
Click to collapse
bump.... any help?
http://www.mediafire.com/file/w3ezy34hu9wscus/SM-G928T+COI5+Modem+and+Bootloader.tar
This file is currently set to private.
My request has sent

(818P) STUCK IN FIRMWARE UPDATE SCREEN AFTER DOWNGRADE FROM NOUGAT (error code 0x2000

I have insatalled the nougat rom from this thread- https://forum.xda-developers.com/g4/development/h815-nougat-stock-locked-bootloader-t3709119 then i make the downgrade with the file provided in the tread and now im stuck in firmware upgrade screen and on the screen appears the next message : 633A B88 Modified. Please help me with this!!!!
Mi phone its the LG G4 818P.
you must read in the forum before open a new thread...
https://forum.xda-developers.com/g4/general/fix-unbricking-lg-g4-h818p-stuck-t3707485

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screenshot : imgur.com/a/4X3LLVA

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