Why can't i find any firmware of note 5 SM-920A ?
I'm having trouble finding SM-920A, are you sure it's not SM-G920A? If so, it's not available because AT&T firmware are simply not available.
no it's SM-N920A .
Then where can i get at&t firmwares ?
AT&T firmwares are not available anywhere. If we don't have them, no one does. Not even Samsung. AT&T does not make their firmwares available publicly.
Right, it sucks though.