The Samsung Galaxy S2, the smartphone touted by some as an iPhone killer,  is being adopted by T-Mobile in the U.S. after gaining good reviews in other parts of the world.

Samsung's Twitter page has confirmed that the T-Mobile version will be powered by a 1.5 GHz dual core Qualcomm APQ8060 processor.

 With a 1.5 GHz processor, T-Mobile’s Galaxy S2 will be the fastest smartphone in the market. Even Google Nexus Prime is expected to feature dual core TI OMAP4460 chipset clocking at 1.5GHz while HTC Vigor is also expected to use a dual core 1.5GHz processor. The iPhone 5 is expected to feature the Apple iPad 2’s A5 dual core processor, which clocks at 1 GHz speed.

The T-Mobile Galaxy S2 will come with a 4.52-inch 480x800 pixels ~206 ppi pixel density Super AMOLED Plus capacitive touchscreen display, which makes it one of the biggest displays featured in a smartphone. Only thne HTC Titan, also known as HTC Eternity and HTC Runnymede, is going to feature a bigger 4.7-inch screen. But both the HTC smartphones are powered by single-core processor. The recently launched most powerful dual-core phone yet, the Motorola Droid Bionic, features a 4.3-inch screen. The iPhone 5 is expected to feature a display screen between 3.5 and 4 inches. Others like Google Nexus Prime and HTC Vigor is expected come with 4.5-inch display.

The T-Mobile Galaxy S2 will come with an 8-megapixel 3264×2448 pixels camera found in most smartphones but it can shoot 1080p 1920×1080 pixels full HD video, which is not found in many smartphones. The iPhone 5 is also expected to come with 8-megapixel camera but with dual-LED flash compared to Hercules which will have LED flash support.

Moreover, T-Mobile’s Galaxy S2 will feature Near Field Communication support. There are not many other phones that support NFC. Google Nexus Prime, expected to be manufactured by Samsung, will surely feature NFC. As of now, NFC is just a rumor for the iPhone 5 and most probably Apple won’t be embracing the technology, since it has no industry standards. But Apple’s fifth-generation iPhone will have mobile payment accessibility. Apple is expected to team up with PayPal for this.

As the biggest of all the surprises, the Samsung Galaxy will have category 24 HSDPA capability to exceed the maximum speeds of 42Mbps downstream, which will make it the fastest HSDPA plus for a smartphone in the market. T-Mobile announced the availability of 42Mbps support in July. Its press release read “T-Mobile's portfolio of 4G products gives customers’ ultra-fast access to the content they want at home or on the go. The company recently introduced the T-Mobile Rocket™ 3.0 laptop stick, its first HSPA+ 42-capable device, offering average download speeds on its HSPA+ 42 network approaching 10 Mbps, with peak speeds of 27 Mbps.”

T-Mobile says its HSPA+ 42 network wil be available in the following U.S. cities: Allentown, Pa.; Anderson, S.C.; Asheville, N.C.; Ann Arbor, Mich.; Baltimore, Md.; Barnstable, Mass.; Bellingham, Wash.; Bloomington, Ind.; Boise, Idaho; Boston, Mass.; Bremerton, Wash.; Bridgeport-Stamford-Norwalk, Conn.; Brunswick, Ga.; Carson City, Nev.; Charlotte, N.C.; Charlottesville, Va.; Chico, Calif.; Coeur d'Alene, Idaho; Eugene, Ore.; Flagstaff, Ariz.; Flint, Mich.; Greensboro, N.C.; Greenville, S.C.; Harrisburg, Pa.; Hartford, Conn.; Indianapolis, Ind.; Knoxville, Tenn.; Lafayette, Ind.; Lancaster, Pa.; Laredo, Texas; Lynchburg, Va.; Manchester, N.H.; Minneapolis-St. Paul, Minn.; New Haven, Conn.; Ogden, Utah; Providence; R.I.; Provo, Utah; Raleigh-Cary, N.C.; Redding, Calif.; Reno-Sparks, Nev.; Richmond, Va.; Roanoke, Va.; Rockford, Ill.; Salem, Ore.; Scranton-Wilkes-Barre, Pa.; Spartanburg, S.C.; State College, Pa.; Tallahassee, Fla.; Terre Haute, Ind.; Tucson, Ariz.; Washington, D.C.; Wichita Falls, Texas; Winchester, Va.; Winston-Salem, N.C.; Worcester, Mass.; and York, Pa.

Today, HSDPA speeds found in most of the smartphones are 21 Mbps or 14 Mbps. Also, the phone is expected to have hidden radios for AT&T HSDPA plus as well, which is a unique feature. The phone also will have MHL port which combines microUSB and HDMI port as one single port. And it will feature a powerful Li-Ion 1800 mAh battery to support the powerful processor. As for iPhone 5, 4G is still a doubtful feature.