"You're thinking too hard, old man," Koji said, dropping a heavy backpack on a stool. "The old methods are dead. That phone has the February security patch. You’re not hacking that with a calculator app."
GSMPlusVIP is a known name in the GSM repair and unlocking niche. They’ve released modified firmware files (often called or “FRP bypass” binaries) for various Samsung models. gsmplusvip frp patched