Screen size
W635Winner: 4.0"+13%
W85783.5"
Quick verdict
W8578 leads the measured specs 4-3.
Measured wins
W635
3
spec wins
Ties
6
equal specs
W8578
4
spec wins
Overall winner
Screen size
Technology
W635
GSM / HSPA
W8578
GSM / HSPA
2G bands
W635
GSM 900 / 1800 / 1900 - SIM 1 & SIM 2
W8578
GSM 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands
W635
HSDPA 850 / 2100
W8578
HSDPA 900 / 2100
Speed
W635
HSPA 7.2/0.384 Mbps
Resolution
equal specsRefresh 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
W8578
HSPA 3.6/0.384 Mbps
Announced
W635
2012, April. Released 2012, April
W8578
2014, April. Released 2014, April
Status
W635
Discontinued
W8578
Discontinued
Dimensions
W635
124 x 64.5 x 11.5 mm (4.88 x 2.54 x 0.45 in)
W8578
116 x 60 x 21 mm (4.57 x 2.36 x 0.83 in)
Weight
W635
157 g (5.54 oz)
W8578
217 g (7.65 oz)
SIM
W635
Dual SIM (Mini-SIM)
W8578
Dual SIM
Type
W635
TFT
W8578
TFT, 256K colors
Size
W635
4.0 inches, 45.5 cm2 (~56.9% screen-to-body ratio)
W8578
3.5 inches, 34.9 cm2 (~50.1% screen-to-body ratio)
Resolution
W635
480 x 800 pixels, 5:3 ratio (~233 ppi density)
W8578
480 x 800 pixels, 5:3 ratio (~267 ppi density)
Other
W635
-
W8578
Secondary TFT, 256K colors 240 x 320 pixels, 2.6 inches
OS
W635
Android 2.3 (Gingerbread)
W8578
Android 4.2 (Jelly Bean)
Chipset
W635
Qualcomm MSM7227A Snapdragon S1
W8578
-
CPU
W635
Cortex-A5
W8578
-
GPU
W635
Adreno 200
W8578
-
Card slot
W635
microSDHC (dedicated slot)
W8578
microSDHC (dedicated slot)
Internal
W635
512MB
W8578
512MB 256MB RAM
Single
W635
5 MP, AF
W8578
5 MP
Video
W635
480p
W8578
Yes
Features
W635
-
W8578
LED flash
Other
W635
No
W8578
No
Loudspeaker
W635
Yes
W8578
Yes
3.5mm jack
W635
Yes
W8578
Yes
WLAN
W635
Wi-Fi 802.11 b/g, hotspot
W8578
Wi-Fi 802.11 b/g
Bluetooth
W635
2.0, A2DP
W8578
2.1, EDR
Positioning
W635
GPS, A-GPS
W8578
No
Radio
W635
No
W8578
FM radio
USB
W635
2.0
W8578
microUSB 2.0
NFC
W635
-
W8578
No
Sensors
W635
Accelerometer, proximity
W8578
Accelerometer
Other
W635
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
W635
Removable Li-Ion 1630 mAh battery
W8578
Li-Ion 2000 mAh, removable
Stand-by
W635
Up to 200 h (2G) / Up to 200 h (3G)
W8578
Up to 850 h
Talk time
W635
Up to 5 h (2G) / Up to 4 h 30 min (3G)
W8578
Up to 9 h
Colors
W635
Gray
W8578
Black
Price
W635
About 460 EUR
W8578
-