He plugged the phone into his PC and launched Z3X. The software detected the Samsung Exynos chipset. He clicked the "Repair IMEI" tab, but an error flashed: "Security Binary U3 – Write Protected."
He rebooted the S20+.
Samsung’s newest anti-repair fuse. You couldn't write to the certificate partition anymore. g935s u3 imei repair z3x
Then it clicked. Leo rummaged in his scrap bin and pulled out a dead S7 edge. Its motherboard was fried, but its was intact. He remembered an old exploit: on U3 firmware, the phone didn't check where the certificate came from, only that it existed. He plugged the phone into his PC and launched Z3X
