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Appendix 160
Usage limitations when the device overheats
If the device overheats while using it or charging, some features, apps, or
even the device may be turned off.
This is a normal operation for the devices that support this feature.
• If the device temperature rises above a certain level, a warning
message appears.
- If you play high-end games, record videos, or upload large files, the
device may overheat for a prolonged period. In this case, a warning
message may appear to notify automatic shutdown.
Turn off the device or close any running apps or features, and let the
device cool down.
• The screen brightness and the operating speed may be limited to cool
down the device. Any running apps or features may slow down or stop.
The device may stop charging.
SIM card error
Make sure the SIM card is correctly inserted.
No network connection or dropped network
Signal is weak. Move to a window or an open area.
You are outside the carrier network area. Move and check the network.
Calls are not available
New network not authorized.
Make sure you have not set call barring for the incoming number.
Make sure you have not set call barring for the number you are dialing.
Device cannot be turned on
When the battery is completely discharged, your device will not turn on.
Fully charge the battery before turning on the device.
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