This is a Note 3 forum... Not an S5 forum, I can only tell you that the Note 3 can not be downgraded from 5 to 4...I guess the S5 is similar.I am getting a Complete(Write) Failed message every time I try to downgrade to android 4.4.1 using Odin with my Galaxy S5, At&t, does this no longer worker for this phone? It has been updated to 5.5.1
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