Screen size
B15Winner: 4.0"+50%
B252.0"
Quick verdict
B15 leads the measured specs 9-1.
Measured wins
B15
9
spec wins
Overall winner
Ties
6
equal specs
B25
1
spec wins
Screen size
Technology
B15
GSM / HSPA
B25
GSM
2G bands
B15
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
B25
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands
B15
HSDPA 900 / 2100 , HSDPA 850 / 1900
B25
-
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
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
B25
-
GPRS
B15
-
B25
Yes
EDGE
B15
-
B25
Yes
Announced
B15
2013. Released 2013
B25
2013. Released 2013
Status
B15
Discontinued
B25
Discontinued
Dimensions
B15
125 x 69.5 x 15 mm (4.92 x 2.74 x 0.59 in)
B25
125 x 57 x 22 mm (4.92 x 2.24 x 0.87 in)
Weight
B15
170 g (6.00 oz)
B25
161 g (5.68 oz)
SIM
B15
Dual SIM
B25
Dual SIM
Other
B15
IP67 dust/water resistant (up to 1m for 30 min) MIL-STD-810G compliant Drop resistant up to 1.8m
B25
IP67 dust/water resistant (up to 1m for 30 min) Drop resistant up to 1.8m Flashlight
Type
B15
TFT
B25
TFT
Size
B15
4.0 inches, 45.5 cm2 (~52.4% screen-to-body ratio)
B25
2.0 inches, 12.4 cm2 (~17.4% screen-to-body ratio)
Resolution
B15
480 x 800 pixels, 5:3 ratio (~233 ppi density)
B25
240 x 320 pixels, 4:3 ratio (~200 ppi density)
Protection
B15
Corning Gorilla Glass
B25
-
OS
B15
Android 4.1 (Jelly Bean)
B25
-
Chipset
B15
Mediatek MT6577 (40 nm)
B25
Mediatek MT6235
CPU
B15
Dual-core 1.0 GHz Cortex-A9
B25
208 MHz
GPU
B15
PowerVR SGX531
B25
-
Card slot
B15
microSDHC (dedicated slot)
B25
microSDHC (dedicated slot)
Internal
B15
4GB 512MB RAM
B25
-
Phonebook
B15
-
B25
Yes
Call records
B15
-
B25
Yes
Single
B15
5 MP, AF
B25
2 MP, AF
Video
B15
1080p@30fps
B25
Yes
Single
B15
VGA
B25
-
Video
B15
B25
-
Other
B15
-
B25
No
Loudspeaker
B15
Yes
B25
Yes
3.5mm jack
B15
Yes
B25
Yes
WLAN
B15
Wi-Fi 802.11 b/g/n, hotspot
B25
No
Bluetooth
B15
3.0, A2DP
B25
2.1
Positioning
B15
GPS
B25
No
NFC
B15
No
B25
No
Radio
B15
FM radio
B25
FM radio
USB
B15
microUSB 2.0
B25
microUSB 2.0
Sensors
B15
Accelerometer, proximity
B25
Messaging
B15
-
B25
SMS
Games
B15
-
B25
No
Java
B15
-
B25
Type
B15
Li-Ion 2000 mAh, non-removable
B25
Li-Ion 1300 mAh, removable
Stand-by
B15
Up to 456 h
B25
Up to 156 h
Talk time
B15
Up to 16 h
B25
Up to 9 h 30 min
Colors
B15
Black
B25
Black
Price
B15
About 250 EUR
B25
About 140 EUR