Screen size
equal specsB154.0"
B15 Q4.0"
Quick verdict
B15 Q leads the measured specs 3-0.
Measured wins
B15
0
spec wins
Ties
14
equal specs
B15 Q
3
spec wins
Overall winner
Screen size
equal specsTechnology
B15
GSM / HSPA
B15 Q
GSM / HSPA
2G bands
B15
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
B15 Q
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands
B15
HSDPA 900 / 2100 , HSDPA 850 / 1900
B15 Q
HSDPA 850 / 900 / 2100 - EU, EMEA, HSDPA 850 / 1700 / 1900 / 2100 - Latin America
Speed
B15
HSPA 7.2/3.6 Mbps
Resolution
equal specsRefresh rate
Peak brightness
Pixel density
equal specsCPU speed
RAM
Storage
equal specsMain camera
equal specsFront camera
Battery
equal specsWired charging
Weight
equal specsThickness
equal specsIP rating
equal specsWi‑Fi
Bluetooth
USB
equal specs5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
B15 Q
HSPA 21.1/5.76 Mbps
Announced
B15
2013. Released 2013
B15 Q
2014, Q2. Released 2014, June
Status
B15
Discontinued
B15 Q
Discontinued
Dimensions
B15
125 x 69.5 x 15 mm (4.92 x 2.74 x 0.59 in)
B15 Q
125 x 69.5 x 15 mm (4.92 x 2.74 x 0.59 in)
Weight
B15
170 g (6.00 oz)
B15 Q
170 g (6.00 oz)
SIM
B15
Dual SIM
B15 Q
Dual SIM (Mini-SIM, dual stand-by)
Other
B15
IP67 dust/water resistant (up to 1m for 30 min) MIL-STD-810G compliant Drop resistant up to 1.8m
B15 Q
IP67 dust/water resistant (up to 1m for 30 min) MIL-STD-810G compliant Drop resistant up to 1.8m
Type
B15
TFT
B15 Q
TFT
Size
B15
4.0 inches, 45.5 cm2 (~52.4% screen-to-body ratio)
B15 Q
4.0 inches, 45.5 cm2 (~52.4% screen-to-body ratio)
Resolution
B15
480 x 800 pixels, 5:3 ratio (~233 ppi density)
B15 Q
480 x 800 pixels, 5:3 ratio (~233 ppi density)
Protection
B15
Corning Gorilla Glass
B15 Q
Corning Gorilla Glass
OS
B15
Android 4.1 (Jelly Bean)
B15 Q
Android 4.4.2 (KitKat)
Chipset
B15
Mediatek MT6577 (40 nm)
B15 Q
Mediatek MT6582M (28 nm)
CPU
B15
Dual-core 1.0 GHz Cortex-A9
B15 Q
Quad-core 1.3 GHz Cortex-A7
GPU
B15
PowerVR SGX531
B15 Q
Mali-400MP2
Card slot
B15
microSDHC (dedicated slot)
B15 Q
microSDHC
Internal
B15
4GB 512MB RAM
B15 Q
4GB 1GB RAM
Single
B15
5 MP, AF
B15 Q
5 MP, AF
Video
B15
1080p@30fps
B15 Q
1080p@30fps
Features
B15
-
B15 Q
LED flash
Single
B15
VGA
B15 Q
VGA
Video
B15
B15 Q
Loudspeaker
B15
Yes
B15 Q
Yes
3.5mm jack
B15
Yes
B15 Q
Yes
WLAN
B15
Wi-Fi 802.11 b/g/n, hotspot
B15 Q
Wi-Fi 802.11 b/g/n, hotspot
Bluetooth
B15
3.0, A2DP
B15 Q
4.0, A2DP, LE
Positioning
B15
GPS
B15 Q
GPS
NFC
B15
No
B15 Q
No
Radio
B15
FM radio
B15 Q
FM radio
USB
B15
microUSB 2.0
B15 Q
microUSB 2.0
Sensors
B15
Accelerometer, proximity
B15 Q
Accelerometer, proximity
Type
B15
Li-Ion 2000 mAh, non-removable
B15 Q
Li-Ion 2000 mAh, removable
Stand-by
B15
Up to 456 h
B15 Q
Up to 504 h
Talk time
B15
Up to 16 h
B15 Q
Up to 16 h
Colors
B15
Black
B15 Q
Black
Price
B15
About 250 EUR
B15 Q
About 320 EUR