Pantech A100 User Manual page 91

2. You may be attempting to use the phone in an overly hot/cold
temperature. Try changing the charging environment.
3. Your battery may have not been connected to the charger properly.
Check the connector.
When you are unable to input data into your Contacts:
Your Contacts memory may be full. Try deleting some entries from your
Contacts.
When you are unable to select a certain function:
You may not have subscribed to that function, or your network service
provider may be in an area where such service cannot be provided.
Contact your local service provider.
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