Screen Protection; Starting Your Device For The First Time - Sony Xperia XZ3 User Manual

To insert either two nano SIM cards or a nano SIM card and a memory card
Note
Do not cut your SIM card, as this may damage your device.
1 Drag out the SIM card tray.
2 Place the main SIM card securely in position for SIM1.
3 Place either the second SIM card or the memory card securely in the tray, in the
correct orientation.
4 Gently push the SIM card tray back into the slot until it fits into place.

Screen protection

Note
Before using your device, remove all protection films to enable full functionality.
Screen covers and protectors may help you protect your device against damage.
We recommend you use only those screen covers intended for your Xperia device.
The use of third-party screen protection accessories may prevent your device from
working correctly by covering sensors, lenses, speakers, or microphones and can
invalidate the warranty.

Starting your device for the first time

It is recommended that you charge the battery for at least 30 minutes before
starting up your device for the first time. You can still use your device while it is
charging. For more information on charging, see
38.
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Charging your device on page