🚨 URGENT WARNING for OnePlus 13 / 15 / 13T users 🚨 ColorOS 16.0.3.501 introduces hardware-level Anti-Rollback (ARB). Not Sure about OxygenOS, but do not attempt to downgrade. Confirmed technical behavior: - If you update your device to 16.0.3.501, the anti-rollback fuse is blown, updating the CPU / XBL security version. - This is permanent and cannot be reversed by software. ⚠️ If you update: - NO downgrade ever (ColorOS / OxygenOS / Custom ROMs) - Flashing older builds = INSTANT HARD BRICK - EDL / 9008 / Chimera will NOT work Real-world cases show motherboard replacement was required - Any custom ROM built before this update = HARD BRICK - Social media claims saying “downgrading is safe” = DANGEROUS MISINFO ⚠️ Highly likely to roll out to OnePlus 12 (Snapdragon 8 Gen 3) next. 👉 Advice: - If you see an update like 16.0.3.5xx, DO NOT UPDATE until the community confirms it’s safe. - Already on 16.0.3.501? DO NOT ATTEMPT TO DOWNGRADE. RT to save devices. 🔁