A new subscription service will let certain T-Mobile customers get more information about unknown callers. The new caller ID service for certain phones will display the name, city, and state of callers, including unknown callers, not just the people in your contact list. Now you can know for sure who is calling and from where.

Name ID will cost $3.99 per month after a free 10-day trial. Right now it’s available for the Samsung Exhibit 4G, but will make it’s way to other handsets after awhile. The T-Mobile myTouch 4G Slide should get it before the month is over.

[CNet]