Use caller ID
Caller ID is a network service that identifies incoming calls. Contact your
service provider to find out how to get this feature.
When Caller ID is active, your phone shows the caller’s phone number
during an incoming call, as long as this number is a part of your service
provider’s wireless network.
The wireless network lets you know if it doesn’t recognize the calling
number. The wireless network will also let you know if the calling party
has blocked the Caller ID feature.
If you have stored the name and number of the calling party in your phone
book and that number is supported by the wireless network, the caller’s
name might also appear.