Samsung Galaxy S 4G Android Phone (T-Mobile)

The Vibrant 4G weighs 4.2 ounces and measures 4.8 x 2.5 x 0.4 inches. Its 1650 mAh lithium-ion battery is rated at up to 6.5 hours of talk time, and up to 432 hours (18 days) of standby time. It runs on the 850/900/1800/1900 MHz GSM/GPRS/EDGE frequencies, as well as T-Mobile's 3G/4G network (1700/2100 MHz; UMTS/HSDPA/HSPA+).

Ultra-fast 4G-enabled, Android 2.2-powered smartphone with 4-inch AMOLED touchscreen display and 1 GHz processor
Enabled for T-Mobile's ultra-fast 4G HSPA+ network with theoretical peak download speeds of up to 21 Mbps
5-MP camera; HD 720p camcorder; front-facing video chat camera; Bluetooth 3.0 stereo music; 16 GB memory microSD card; corporate and personal e-mail
Up to 6.5 hours of talk time, up to 432 hours (18 days) of standby time; released in February, 2011
What's in the Box: handset, rechargeable battery, charger, 16 GB microSD card, USB cable, wired stereo headset, quick start guide

Text (SMS) and picture/video (MMS) messaging
Rich HTML e-mail application seamlessly syncs your e-mail, calendar and contacts from Gmail as well as most other POP3 or IMAP e-mail services. It's also compatible with Microsoft Exchange for corporate e-mail.
Instant messaging support for Google Talk, as well as AOL, Yahoo! Messenger and Windows Live Messenger.
Full HTML Web browser enables you to view more pages and enjoy better Web content delivered efficiently to your phone.
Google Calendar app syncs with the Web-based version, so any event that you add to your phone will show up on the Web-based Google Calendar (and vice versa).

5-megapixel rear camera with 4x digital zoom. You can share them with family and friends by sending them to any e-mail address, T-Mobile camera phone, or MyAlbum.
VGA front-facing camera for video chats (fixed focus) for face-to-face chats on popular services such as Qik or Skype
HD 720p video capture (from rear camera)