T-Mobile rolls out optional caller ID service

A new subscription service will let cell phone owners find out more about strangers who get hold of their mobile phone number.

Samsung Exhibit 4G
Josh Miller/CNET

A new subscription service will let certain T-Mobile customers glean more information about unknown callers. The carrier announced today a new caller ID service for select phones that will display the name, city, and state of callers, including unknown dialers--not just those in your contact list.

Name ID, as the service is called, will also let users save these contact details to their address book.

Name ID will cost $3.99 per month after a free 10-day trial. It's currently available for the Samsung Exhibit 4G, but will expand to other handsets. The T-Mobile myTouch 4G Slide should get it later this month.

The service is supplied by Cequint, which also counts Verizon, AT&T, HTC, LG, Motorola, RIM, and Google among its customer base. The company also produces the City ID app that comes preloaded on many of today's smartphones.