Screen size
B352.4"
S31Winner: 4.7"+49%
Quick verdict
S31 leads the measured specs 9-1.
Measured wins
B35
1
spec wins
Ties
8
equal specs
S31
9
spec wins
Overall winner
Screen size
Technology
B35
GSM / HSPA / LTE
S31
GSM / HSPA / LTE
2G bands
B35
GSM 850 / 900 / 1800 / 1900
S31
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only)
3G bands
B35
HSDPA 850 / 900 / 1900 / 2100
S31
HSDPA 850 / 900 / 1900 / 2100 - EU, HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 - USA
4G bands
B35
1, 3, 7, 8, 20
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
equal specsRAM
Storage
Main camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
equal specsWi‑Fi
Bluetooth
equal specsUSB
equal specs5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
S31
1, 2, 3, 5, 7, 8, 20 - EU, 2, 3, 4, 5, 7, 12, 17 - USA
Speed
B35
HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps
S31
HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps
Announced
B35
2018, September. Released 2018, October
S31
2017, September. Released 2017, October
Status
B35
Discontinued
S31
Discontinued
Dimensions
B35
138 x 60 x 14 mm (5.43 x 2.36 x 0.55 in)
S31
146 x 74.4 x 12.6 mm (5.75 x 2.93 x 0.50 in)
Weight
B35
130 g (4.59 oz)
S31
200 g (7.05 oz)
SIM
B35
· Nano-SIM· Nano-SIM + Nano-SIM
S31
· Nano-SIM· Nano-SIM + Nano-SIM
Other
B35
IP68 dust tight and water resistant (immersible up to 1.2m for 35 min) MIL-STD-810G compliant Drop resistant up to 1.8m Flashlight
S31
IP68 dust tight and water resistant (immersible up to 1.2m for 30 min) Drop resistant up to 1.8m MIL-STD-810G compliant
Type
B35
TFT
S31
TFT
Size
B35
2.4 inches, 17.8 cm2 (~21.5% screen-to-body ratio)
S31
4.7 inches, 60.9 cm2 (~56.1% screen-to-body ratio)
Resolution
B35
240 x 320 pixels, 4:3 ratio (~167 ppi density)
S31
720 x 1280 pixels, 16:9 ratio (~312 ppi density)
Protection
B35
Scratch-proof glass
S31
Corning Gorilla Glass 3
OS
B35
KaiOS 2.5.1
S31
Android 7.0 (Nougat)
Chipset
B35
Qualcomm MSM8905 Snapdragon 205 (28 nm)
S31
Qualcomm MSM8909 Snapdragon 210 (28 nm)
CPU
B35
Dual-core (2x1.3 GHz Cortex-A7)
S31
Quad-core 1.3 GHz Cortex-A7
GPU
B35
Adreno 304
S31
Adreno 304
Card slot
B35
microSDXC (uses shared SIM slot)
S31
microSDXC (dedicated slot)
Internal
B35
4GB 512MB RAM
S31
16GB 2GB RAM
Other
B35
eMMC 4.5
S31
eMMC 4.5
Single
B35
2 MP
S31
8 MP, AF
Features
B35
LED flash
S31
LED flash
Video
B35
480p@30fps
S31
720p@30fps
Other
B35
No
S31
-
Single
B35
-
S31
2 MP
Video
B35
-
S31
Loudspeaker
B35
Yes
S31
Yes
3.5mm jack
B35
Yes
S31
Yes
WLAN
B35
Wi-Fi 802.11 b/g/n
S31
Wi-Fi 802.11 b/g/n
Bluetooth
B35
4.1, A2DP, LE
S31
4.1, A2DP, LE
Positioning
B35
GPS, GLONASS
S31
GPS, GLONASS, BDS
NFC
B35
No
S31
No
Radio
B35
FM radio
S31
FM radio
USB
B35
microUSB 2.0
S31
microUSB 2.0, OTG
Sensors
B35
Accelerometer
S31
Accelerometer, proximity, compass
Other
B35
Downloadable applications Facebook, Gmail, Whatsapp, etc.
S31
-
Type
B35
Li-Ion 2300 mAh, non-removable
S31
Li-Ion 4000 mAh, non-removable
Stand-by
B35
Up to 720 h (3G)
S31
-
Talk time
B35
Up to 12 h (3G)
S31
-
Colors
B35
Black
S31
Black
Price
B35
About 110 EUR
S31
About 330 EUR