Daewoo SMD-4026B Benutzerhandbuch

 

 

 18

 

1：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. 

 
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 

The mobile 

phone cannot 

connect the 

network 

The SIM card is invalid 

Contact your network service 

provider 

The mobile phone is not in a service area of 

the GSM network 

Move to the network operator's 

service area 

The signal is weak 

Move to a place where the 

signal quality is high 

The battery 

cannot be 

charged 

The charging voltage does not match the 

voltage range indicated on the charger 

Ensure the charging voltage 

matches the voltage range 

indicated on thecharger 

An improper charger is used 

Use the charger specially 

designed for the mobile phone 

Poor contact 

Ensure the charger plug is in 

good contact with the mobile 

phone