Samsung SGH-T629ASBTMB - Manual (Page 23)

Section 2: Understanding Your Phone 19
Keys
Section 2
15. Micro SD memory card slot. This expansion slot allows
you to insert a micro SD memory card to add additional
memory and storage capacity.
16. The external speaker used for the speakerphone and to
hear audio during a video playback.
17. The headset jack is used for the hands-free headset.
Plug your battery charger cable or your USB cable here.
18. Lens used to take photos and record video.