as a fact of matter , K750 breaks into 3 Categories :
-Cid 16 : need test point to get unlocked .
-Cid 36 : no test point needed .
-Cid 49 : no test point needed .
The 2 first one are pretty much easy to deal with ...just use ufs3 , Setool , usbsmart ...ext
As for the last you may use Usbsmart (the most powerful tool ever seen, so far despite some drawbacks) !
Good luck
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SHARE WHATERVER YOU KNOW , and DONT EXPECT CREDITS FROM PEOPLE ....Since IT'S A DUTY
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