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iO 3D User Manual
Issue
Cause
Solution
No Internet
APN settings are not set up.
Ensure APN settings are correct or add new APN settings by entering or
confirming the information provided by your GSM carrier
SIM card error
The SIM card is damaged.
Contact your network service provider
The SIM card is not in position.
Check the SIM card
The metal face of the SIM card is polluted.
Clean the SIM card with a clean cloth
Poor received signal
quality
Signals are obstructed. For instance, radio
waves cannot be effectively transmitted
nearby a high building or in a basement.
Move to a place where signals can be effectively transmitted
Line congestions occur when you use the
mobile phone in high-traffic hours
Avoid using the mobile phone in high-traffic hours
The mobile phone
cannot be powered
on
The battery energy is exhausted.
Charge the battery
Calls cannot be
dialed
Call barring is activated
Cancel call barring
Basic Troubleshooting
If you find exceptions when operating the mobile phone, restore the factory settings and then refer to the following table to solve the problem. If the problem persists,
contact the distributor or service provider.
Summary of Contents for IO 3D
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