50
9.
Appendix I
Troubleshooting
Phenomena
Possible Causes
Unable to switch on
1.
Does the battery have power?
2.
Is the battery placed correctly
SIM failed
1.
The SIM card is dirty. Clean it.
2.
Reinstall the SIM card.
3.
The SIM card is damaged. Replace it.
Poor signals
Check the signal strength icon on the screen. If the icon
contains 5 bars, it indicates the signal is the strongest; if below
2 bars, it indicates the signal is very poor.
Unable to dial out
1.
Maybe you have set Hide My Caller ID but your
network operator does not provide this service for you.
2.
Strong interference exists around you.
3.
Maybe you have activated the call restriction function.
4.
Maybe you have activated Line 2 but your network
operator does not provide this service for you.
Unable to charge the battery
1.
The battery may discharge too much; so it cannot be
charged until it is connected for certain time.
2.
Its performance has worsened.
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