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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 3 bars, it indicates the signal is the strongest; if below
1 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.
Unable to register to the network
1.
Too weak signals or strong interference.
2.
SIM card installed properly? Bad contact or SIM card
damaged? If the SIM card is broken, please contact the
network operator to replace it.
Photos taken are too dark
1.
Check if the too low photo brightness is set.
2.
Check if ambient ray is too dark.
Summary of Contents for DST13
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