Screen size
W8203.2"
W8578Winner: 3.5"+8.6%
Quick verdict
W8578 leads the measured specs 5-3.
Measured wins
W820
3
spec wins
Ties
5
equal specs
W8578
5
spec wins
Overall winner
Screen size
Technology
W820
GSM / HSPA
W8578
GSM / HSPA
2G bands
W820
GSM 900 / 1800 / 1900
W8578
GSM 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands
W820
HSDPA 2100
W8578
HSDPA 900 / 2100
Speed
W820
HSPA 7.2/0.384 Mbps
W8578
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
equal specsFront camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
equal specs5G support
equal specsNFC
3.5mm jack
equal specsSD card
equal specsStereo speakers
HSPA 3.6/0.384 Mbps
Announced
W820
2012, March
W8578
2014, April. Released 2014, April
Status
W820
Discontinued
W8578
Discontinued
Dimensions
W820
114.6 x 57.7 x 14.8 mm (4.51 x 2.27 x 0.58 in)
W8578
116 x 60 x 21 mm (4.57 x 2.36 x 0.83 in)
Weight
W820
143 g (5.04 oz)
W8578
217 g (7.65 oz)
SIM
W820
Mini-SIM
W8578
Dual SIM
Type
W820
TFT
W8578
TFT, 256K colors
Size
W820
3.2 inches, 30.5 cm2 (~46.1% screen-to-body ratio)
W8578
3.5 inches, 34.9 cm2 (~50.1% screen-to-body ratio)
Resolution
W820
320 x 480 pixels, 3:2 ratio (~180 ppi density)
W8578
480 x 800 pixels, 5:3 ratio (~267 ppi density)
Other
W820
-
W8578
Secondary TFT, 256K colors 240 x 320 pixels, 2.6 inches
OS
W820
Android 2.3 (Gingerbread)
W8578
Android 4.2 (Jelly Bean)
Card slot
W820
microSDHC (dedicated slot)
W8578
microSDHC (dedicated slot)
Internal
W820
512MB
W8578
512MB 256MB RAM
Single
W820
5 MP, AF
W8578
5 MP
Features
W820
LED flash
W8578
LED flash
Video
W820
176x144@15fps
W8578
Yes
Single
W820
Yes
W8578
-
Video
W820
W8578
-
Other
W820
-
W8578
No
Loudspeaker
W820
Yes
W8578
Yes
3.5mm jack
W820
Yes
W8578
Yes
WLAN
W820
Wi-Fi 802.11 b/g, hotspot
W8578
Wi-Fi 802.11 b/g
Bluetooth
W820
2.0
W8578
2.1, EDR
Positioning
W820
GPS, A-GPS
W8578
No
Radio
W820
FM radio
W8578
FM radio
USB
W820
2.0
W8578
microUSB 2.0
NFC
W820
-
W8578
No
Sensors
W820
Accelerometer, proximity, compass
W8578
Accelerometer
Other
W820
MP3/WAV/WMA/AAC+ player MP4/H.263 player Document viewer Photo viewer/editor Organizer Voice memo/dial Predictive text input
W8578
SNS integration MP3/WAV/WMA/eAAC+ player MP4/H.263 player Document viewer Photo viewer Organizer Voice memo Predictive text input
Type
W820
Removable Li-Ion 2100 mAh battery
W8578
Li-Ion 2000 mAh, removable
Stand-by
W820
Up to 600 h
W8578
Up to 850 h
Talk time
W820
Up to 8 h
W8578
Up to 9 h
Colors
W820
Black
W8578
Black