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the battery and take it to an authorized service center.
The data saved in your phone might be deleted due to careless
use, repair of the phone, or upgrading of the software. Please
backup your important phone numbers. (Ring tones, text
messages, voice messages, picture, and videos could also be
deleted.) The manufacturer is not liable for damage due to the
loss of data.
Do not turn your phone on or off when the phone is close to
your ear.
Troubleshooting
Phenomena
Unable to switch on
SIM failed
Poor signals
Possible Causes
1.
Does the battery have power?
2.
Is the battery placed correctly
1.
The SIM card is dirty. Clean it.
2.
Reinstall the SIM card.
3.
The SIM card is damaged.
Replace it.
Check the signal strength icon on the
screen. If the icon contains 4 bars, it
indicates the signal is the strongest; if
below 1 bars, it indicates the signal is
very poor.
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