This is quad band phone that allows you travel the world without any network problem. You can use your t-mobile or other sim card because it's unlock GSM phone.
This  has all the features that other ciphone has. such as rolling menu, g-sensor and so on.
Detail Sepcifications:
Release: may, 2009
Innovative features: slide to unlock, flow touch control, dual SIM dual standby, shake and tilt functions, motion/gravity sensor, supports JAVA, FM radio
Available Languages: English, and other languages, for specific language, please do check with our cstuome service to confirm before place your order. 
Dimensions:114*60*11mm
Display Type: TFT, QVGA, 16000K colors
Display Size: 3.3" touch screen, 480×640 pixels
Ringtones: Polyphonic 64 channels; supports mp3, midi, mp4
Vibration: Yes
Music: Supports MP3 background play, equalizer
Video: 3GP, MP4; supports full screen play
Phonebook: 300 groups of phone books
Internal Memory: 4GB
Internet Connectivity: GPRS / WAP 2.0
Messaging: 300 SMS, MMS
Data transfer: USB cable / Bluetooth 2.0
Games: built-in JAVA games; can download and install more games and applications
Camera: 3.2MP camera; support video recording; max image output size: 1280*960 pixels. Supports continuous shooting, 15s shooting delay, night shooting, white balance, exposure compensation.
Battery: 1200mah
Stand-by time: 180-240 hours
Talk time: 120-240 minutes
Handsfree, Calendar, Memo, Alarm clock, World time, Calculator, Voice recorder, E-book, SMS group sending
Support JAVA; users can install many JAVA version software programs
Package Includes:
B668 GSM Quadband Cell Phone x 1
Battery x 1
Earphone x 1
USB cable x 1
Charger x2（one for emergency charger）