Screen size
B154.0"
S50Winner: 4.7"+15%
Quick verdict
S50 leads the measured specs 11-1.
Measured wins
B15
1
spec wins
Ties
5
equal specs
S50
11
spec wins
Overall winner
Screen size
Technology
B15
GSM / HSPA
S50
GSM / HSPA / LTE
2G bands
B15
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
S50
GSM 850 / 900 / 1800 / 1900
3G bands
B15
HSDPA 900 / 2100 , HSDPA 850 / 1900
S50
HSDPA 850 / 900 / 2100 , HSDPA 850 / 1700 / 1900 / 2100
Speed
B15
HSPA 7.2/3.6 Mbps
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
equal specsWi‑Fi
Bluetooth
USB
equal specs5G support
equal specsNFC
3.5mm jack
equal specsSD card
equal specsStereo speakers
S50
HSPA, LTE Cat4 150/50 Mbps
4G bands
B15
-
S50
1, 3, 5, 7, 8, 20
Announced
B15
2013. Released 2013
S50
2014, September. Released 2014, November
Status
B15
Discontinued
S50
Discontinued
Dimensions
B15
125 x 69.5 x 15 mm (4.92 x 2.74 x 0.59 in)
S50
144.5 x 77 x 12.7 mm (5.69 x 3.03 x 0.5 in)
Weight
B15
170 g (6.00 oz)
S50
185 g (6.53 oz)
SIM
B15
Dual SIM
S50
Micro-SIM
Other
B15
IP67 dust/water resistant (up to 1m for 30 min) MIL-STD-810G compliant Drop resistant up to 1.8m
S50
IP67 dust/water resistant (up to 1m for 30 min) MIL-STD-810G compliant Drop resistant up to 1.2m
Type
B15
TFT
S50
IPS LCD
Size
B15
4.0 inches, 45.5 cm2 (~52.4% screen-to-body ratio)
S50
4.7 inches, 60.9 cm2 (~54.7% screen-to-body ratio)
Resolution
B15
480 x 800 pixels, 5:3 ratio (~233 ppi density)
S50
720 x 1280 pixels, 16:9 ratio (~312 ppi density)
Protection
B15
Corning Gorilla Glass
S50
Corning Gorilla Glass 3
OS
B15
Android 4.1 (Jelly Bean)
S50
Android 4.4 (KitKat)
Chipset
B15
Mediatek MT6577 (40 nm)
S50
Qualcomm MSM8926 Snapdragon 400 (28 nm)
CPU
B15
Dual-core 1.0 GHz Cortex-A9
S50
Quadcore 1.2 GHz Cortex-A7
GPU
B15
PowerVR SGX531
S50
Adreno 305
Card slot
B15
microSDHC (dedicated slot)
S50
microSDXC (dedicated slot)
Internal
B15
4GB 512MB RAM
S50
8GB 2GB RAM
Other
B15
-
S50
eMMC 4.5
Single
B15
5 MP, AF
S50
8 MP, AF
Video
B15
1080p@30fps
S50
1080p@30fps
Features
B15
-
S50
LED flash
Single
B15
VGA
S50
VGA
Video
B15
S50
Loudspeaker
B15
Yes
S50
Yes
3.5mm jack
B15
Yes
S50
Yes
WLAN
B15
Wi-Fi 802.11 b/g/n, hotspot
S50
Wi-Fi 802.11 b/g/n, hotspot
Bluetooth
B15
3.0, A2DP
S50
4.0, A2DP, LE
Positioning
B15
GPS
S50
GPS, GLONASS
NFC
B15
No
S50
Yes
Radio
B15
FM radio
S50
FM radio
USB
B15
microUSB 2.0
S50
microUSB 2.0, OTG
Sensors
B15
Accelerometer, proximity
S50
Accelerometer, proximity, compass
Type
B15
Li-Ion 2000 mAh, non-removable
S50
Li-Ion 2630 mAh, non-removable
Stand-by
B15
Up to 456 h
S50
Up to 792 h
Talk time
B15
Up to 16 h
S50
Up to 16 h
Charging
B15
-
S50
Wireless (Qi)
Colors
B15
Black
S50
Forest, Slate
Price
B15
About 250 EUR
S50
About 460 EUR