The battery life becomes shorter in high temperature environment.
- Replace a new qualified battery.
Power consumption increased in areas with weak signal.
- Please temporarily turn off the device.
The SIM card cannot work properly or cannot be used.
- Make sure the SIM card has a balance instead of arrears.
The mobile network not available.
- Select SIM card network, and contact the operator to activate the cellular network.
In areas with poor signal, out of network service, or SIM card is not effective.
- Remove the SIM cards, and reinsert them properly, or change another one. Move to
somewhere with better network signal or go to the window if you are in the building.
FDD-LTE: B1/B3/B5/B7/B8/B20
FDD-LTE: B1/B2/B4/B5/B7/B12/B13/B17/B28A/B28B
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