Downgrade sch i 545 from lollipop to kitkat samsung mobile phone , proper method here.

I have sch i545 baseband. Unknown and imei null, I cant repair it via z3x, model not supported I used gt i9505,and i337. But any thing can success, now I want ask if I can downgrade it from lollipop to kitkat flash found on samsony.
kindly to be helped me.

Download All Samsung Firmwares From here:

Samsung Firmwares

You can download other softwares and other All solution from here:


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