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• Chances are that airplane mode is on. Turn off airplane
mode.
• Check if software is abnormal. If so, restart the device.
• Check if SIM card has failure. If so, check or change SIM
card.
• Ensure that the dialing is right.
• Check if cellular data setting has failure. If so, go to Set-
tings to set up cellular data.
• Check if pre-paid charge has reached its limit. If so, contact
service provider.
Calls are not connected
• Check if phone number is too long.
• Ensure international roaming service and international call
service is enabled. If not, contact service provider.
No calls alerting sound
Check if silent or vibrate mode is enabled.
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