Here are a few pros:
Unpredictably light: The Epic 4G weighs only 5.5 ounces because of the slide out keypad adding an extra ounce and the thickness will only be few tenths of an inch. Its a reasonable sized mobile that weighs unbelievably less. It will be launched on August 31 and you will get a 2 year Sprint contract for 249$, after mail in rebate of 100$.
Dazzling display: The Epic 4G sports 4” inch screen size that works on Super AMOLED technology, which gives HQ colour images better than a Standard AMOLED technology. Super AMOLED images look well indoor but outdoor it looks dim.
Soft, Silky performance: The 1GHZ powered Hummingbird allows you to swap across the home screen and menus real fast. Windows opened swiftly and Switching between portrait and landscape mode will happen pretty quick in no time.
Lovely QWERTY keypad: The QWERTY pad slides across in soft and elastic way. There are 5 rows of keys with a row for numbers alone. There is no dedicated @ key and the space key looks small.
Battery life: Just like the Evo 4G, the Epic 4G handset’s battery may get harmed when the handset is used in areas having weak 4G signal. If you live in 4G coverage area, no problem, but if you are in a place having 3G coverage only, it is better switch off the 4G antenna to conserve your battery charge and life.
Ships with Android 2.1, not 2.2: Epic 4G runs on Android 2.1 only and not on Android 2.2, which means it has no Flash support. It seems Samsung and Sprint has not taken any steps to upgrade the Epic 4G to Android 2.2 Froyo, as the release date is nearing.