ASUS ZenFone 3 Ultra (ZU680KL) User Manual
![ASUS ZenFone 3 Ultra (ZU680KL) Phone manual cover](/images/qebnFexLPQTVxAuZfSlULCZr/thumbs/thumb175x175.webp)
To perform a factory reset, go to Settings > Backup & reset > Factory data reset. Follow the on-screen instructions to complete the reset. Ensure you've backed up important data as this will erase all data on the phone.
To extend battery life, reduce screen brightness, limit background app activity, and use power-saving modes under Settings > Battery. Keeping the software updated can also help improve battery performance.
To take a screenshot, press and hold the Power button and the Volume Down button simultaneously until you hear a shutter sound or see a visual indication on the screen.
Check the charger and cable for any damage and try using a different power outlet. Clean the charging port of any debris. If the issue persists, try a different charger or cable, and consider visiting a service center.
To update the software, go to Settings > About > System update > Check for updates. If an update is available, follow the on-screen instructions to download and install it. Ensure your device is charged or connected to a power source during the update.
To enable developer options, go to Settings > About > Software information and tap 'Build number' seven times. You will see a notification that developer mode has been enabled. Developer options will now appear in the main settings menu.
Try restarting your device, clearing app cache, and uninstalling unused apps. Ensure your phone has sufficient storage space and consider a factory reset if the problem persists. Keeping the software updated can also improve performance.
To insert a SIM card, locate the SIM card tray on the side of the device. Use the eject tool provided with your phone to open the tray, then place the SIM card into the tray and reinsert it into the phone.
Use the ASUS Data Transfer app or a similar third-party app to transfer contacts, photos, and other data. You can also use Google account synchronization or a computer to back up and transfer your data.
First, try restarting your phone. If the touchscreen remains unresponsive, remove any screen protectors or cases that may be interfering. If the problem persists, perform a factory reset and consider visiting a service center if necessary.