AT&T Z221 User Manual

43

Problem 

Battery will not 

charge

The battery or battery charger is damaged.

Contact the dealer.

The phone’s temperature is below 14°F (-10°C) 

or above 122 °F (50°C).

Adjust the battery charging environment to 

avoid temperature extremes.

Poor contact between the battery and charger.

Check all connectors to make sure all 

connections have been properly made.

Shortened 

standby time

The standby time is related to your service 

provider system configuration. The same phone 

used with different service providers’ systems 

will not provide exactly the same length of 

standby time.

If you are located in an area where signaling is 

weak, temporarily switch off the phone.

The battery is depleted. In high-temperature 

environments, battery life will be shortened.

Use a new battery.

If you are not able to connect to the network, 

the phone will continue to send out signals as 

it attempts to locate a base station. Doing so 

consumes battery power and will consequently 

shorten standby time.

Change your location to one where the network 

is accessible, or temporarily turn off your phone.

You cannot 

switch your 

phone on

Battery power has been depleted.

Recharge the phone’s battery.

(U)SIM card error

(U)SIM card malfunction or damage.

Take the (U)SIM card to your service provider 

for testing.

(U)SIM card inserted improperly.

Insert the (U)SIM card properly.

Debris on the (U)SIM card contacts.

Use a soft, dry cloth to clean the  

(U)SIM card contacts.