The T-Mobile Galaxy S II has a large screen, so it’s a bigger-than-average device at 5.11 inches tall by 2.71 inches wide by 0.37 inch thick. The width makes the handset slightly awkward to hold during a call, and it’s not the most pocket-friendly. That said, the phone is relatively thin and lightweight at 4.77 ounces, so it’s not horribly cumbersome.