Asus Zenfone Selfie Z00ud Firmware 6.0 1 -

The official Android 6.0.1 (Marshmallow) firmware for the ASUS ZenFone Selfie (ZD551KL / Z00UD)

Trigger the Update: Disconnect the USB cable. A notification should appear in the status bar saying "System Update File Detected." asus zenfone selfie z00ud firmware 6.0 1

• Go to Settings > About > Software Information > Build Number (tap 7 times).
• Back to Settings > Developer Options > USB Debugging (switch ON).

This method works on locked and unlocked bootloaders. The official Android 6

No. ASUS never released official Nougat for the Snapdragon 615-based Z00UD. Unofficial custom ROMs exist (e.g., LineageOS 14.1), but they break some camera features. Go to Settings > About > Software Information

Press and hold Volume Down + Power Button to enter Recovery Mode.