AT&T Z431 manual Problem Possible Causes Possible Solution Battery will, Temperature to return to

Models: Z431

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Problem

Possible Causes

Possible Solution

 

 

 

Battery will

The battery or battery charger

Contact the dealer where you

not charge

is damaged.

purchased the equipment.

 

The phone’s temperature is

1.  Move the battery to an

 

below 32°F (0°C) or higher

environment where the

 

than 113°F (45°C).

temperature is within

 

 

operating range.

 

 

2.  Allow time for the battery’s

 

 

temperature to return to

 

 

normal before attempting

 

 

to charge again.

 

Poor contact between the

Check and clean all

 

battery and charger.

connectors to ensure good

 

 

contact.

Unusually

Certain phone functions

Disable Bluetooth and/or HAC

short battery

consume additional battery

mode if you are not using

life

power, such as Bluetooth and

these functions.

 

HAC mode.

 

 

Weak network signal.

Turn off the phone until you

 

 

reach an area with a strong

 

 

network signal.

Phone will not

Battery is depleted.

Charge the battery.

turn on

 

 

62

Troubleshooting and FAQs

Problem

Possible Causes

Possible Solution

 

 

 

SIM card error

SIM card is damaged or

Take the SIM card to a service

 

defective.

center for testing.

 

SIM card inserted improperly.

Check to ensure that the

 

 

SIM card is facing the right

 

 

direction and that it is fully

 

 

inserted into the slot.

 

Dirt or debris on the SIM card

Use a soft, dry cloth to clean

 

contacts.

the SIM card contacts.

PIN code is

You have entered an incorrect

If you have the SIM card’s

blocked

PIN code ten consecutive

PUK code, use the PUK code

 

times.

to unlock the SIM card.

 

 

If you do not have the PUK

 

 

code, contact your service

 

 

provider.

Unable to enter

The Address Book’s memory

Delete unneeded data from

information

is already full.

the Address Book.

into the

 

 

Address Book

 

 

Troubleshooting and FAQs

63

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AT&T Z431 manual Problem Possible Causes Possible Solution Battery will, Temperature to return to, Normal before attempting