Form Factor
Body
Side-Slider, Querty Keyboard, Touchscreen	Side-Slider, Querty Keyboard, Touchscreen
Dimensions
111 x 55 x 15.2 mm (4.37 x 2.17 x 0.60 in)	117 x 60 x 16 mm (4.61 x 2.36 x 0.63 in)
Weight
117 g (4.13 oz)	130 g (4.59 oz)
Colors
Black	Black

Type
Display
TFT TouchWiz 3.0 UI	TFT, 65K colors
Size
3.2 inches, 29.1 cm² (~47.7% screen-to-body ratio)	3.6 inches, 36.9 cm² (~52.5% screen-to-body ratio)
Resolution
240 x 400 pixels, 5:3 ratio (~146 ppi density)	480 x 800 pixels, 5:3 ratio (~259 ppi density)
Multitouch
	Yes
Protection
	Corning Gorilla Glass

Alert Types
Notifications
Vibration, MP3, WAV ringtones	Vibration, MP3, WAV ringtones

Internal Memory
Memory
160MB	2GB ROM, 512MB RAM
Storage Type
DNSe sound enhancement
Card Slot
microSDHC (dedicated slot), 1 GB included	microSDHC (dedicated slot), 2 GB included
Phonebook
Practically unlimited entries and fields, Photocall
Call Records
Practically unlimited

Operating System (OS)
Software
Android OS, v2.2 (Froyo)	Android OS, v2.2 (Froyo)
Upgradable
upgradable to v2.3.6 (Gingerbread)	Upgradable to 2.3 (Gingerbread)
UI
	Sense UI
Java
Yes, via Java MIDP emulator	Yes, via Java MIDP emulator
Browser
HTML	HTML, Adobe Flash
Messaging
SMS(threaded view), MMS, Email, Push Email, IM	SMS(threaded view), MMS, Email, Push Email, IM
Games
Downloadable

Chipset
Hardware
Qualcomm MSM7227 Snapdragon S1	Qualcomm MSM7630 Snapdragon S2
CPU
600 MHz	800 MHz Scorpion
GPU
Adreno 200	Adreno 205
Sensors
Accelerometer, proximity, compass	Accelerometer, proximity, compass
Keyboard
QWERTY	QWERTY
Soft Keys
2
SIM
Mini-SIM	Mini-SIM
Speakers
Yes	Yes
Navigation / Controls Keys
D-Pad
Audio Jack
3.5 mm	3.5 mm

Features
Additional Features
Document viewer	Document viewer Voice memo/dial/commands Predictive text input

Samsung Galaxy 551

HTC EVO Shift 4G