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)	114 x 59 x 14 mm (4.49 x 2.32 x 0.55 in)
Weight
117 g (4.13 oz)	130 g (4.59 oz)
Colors
Black	Black/Red, Black/Green, Lunar Grey

Type
Display
TFT TouchWiz 3.0 UI	TFT TouchWiz 3.0 UI
Size
3.2 inches, 29.1 cm² (~47.7% screen-to-body ratio)	3.2 inches, 30.5 cm² (~45.3% screen-to-body ratio)
Resolution
240 x 400 pixels, 5:3 ratio (~146 ppi density)	320 x 480 pixels, 3:2 ratio (~180 ppi density)
Multitouch
	Yes

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

Internal Memory
Memory
160MB	150MB ROM, 270MB 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	Practically unlimited entries and fields, Photocall
Call Records
Practically unlimited	Practically unlimited

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

Chipset
Hardware
Qualcomm MSM7227 Snapdragon S1
CPU
600 MHz	800 MHz ARMv6
GPU
Adreno 200
Sensors
Accelerometer, proximity, compass	Accelerometer, proximity
Keyboard
QWERTY	QWERTY
Soft Keys
2	2
SIM
Mini-SIM	Mini-SIM
Speakers
Yes	Yes
Navigation / Controls Keys
D-Pad	D-Pad
Audio Jack
3.5 mm	3.5 mm

Features
Additional Features
Document viewer	Photo/video editor Document viewer Voice memo Predictive text input (Swype)

Samsung Galaxy 551

Samsung Gravity SMART