HTC Tattoo is the second phone to take advantage of HTC's Sense UI, a mobile experience focused on making Android even more simple and natural. Designed by listening and observing how people live and communicate, HTC Tattoo also integrates Google’s innovative mobile services including: Google Maps, search, Google Mail, and Android market. It also includes an autofocus camera, 3.5mm stereo headset jack, and expandable (microSD) memory.