AT&T TR1909 Trimline Corded Phone with Caller ID, White The AT&T TR1909 Trimline Corded Phone with Caller ID (White) is compact, affordable and offers a wide range of useful features. Among those features are a built-in caller ID and call waiting, call waiting flash indicator and 3 -line LCD display. The 50 name/number caller ID history ensures access to numbers long after the calls were received. The TR1909 design is ideal for small spaces and can be placed on a tabletop or mounted on the wall.