J730f Custom Rom !new! Site
: He enabled Developer Options and toggled OEM Unlock .
: A custom recovery like TWRP is required to flash ROM files. j730f custom rom
Here's a paper on the J730F custom ROM:
Mismatched modem firmware. Fix: Flash the latest stock Oreo modem file (CP tab in Odin) before installing the custom ROM. : He enabled Developer Options and toggled OEM Unlock