The most likely source for this specific dump (split into parts) is a service site like Elektrotanya or specialized firmware forums like Kazmi Elecom . 2. Steps to Download
Such files are usually packed as part1.rar through partN.rar . You must download all parts (including part14) and place them in the same folder. Download RT2851V09 3840x2160 Kivi 55U730GU part14 rar
kivi 55u730gu main hk.t.rt2851v09 trouleshooting - Elektrotanya The most likely source for this specific dump