Download Mode is the special state in which Odin can communicate with your device to write firmware. The key combination varies slightly by model:
Yes, but you must flash the exact CSC for that carrier. Flashing an unlocked (U1) firmware on a carrier-locked (U) phone may fail on the bootloader check. gsmromnet odin full
Downloading stock firmware for a device you own is generally considered fair use. However, redistributing it or using it for commercial repair services without proper licensing may violate copyright. GSMROM.net operates in a gray area. Download Mode is the special state in which
: Samsung’s proprietary internal tool used to communicate with devices in Download Mode. gsmromnet odin full