Screen size
K4 (2017)5.0"
W10 AlphaWinner: 5.7"+12%
Quick verdict
W10 Alpha leads the measured specs 9-2.
Measured wins
K4 (2017)
2
spec wins
Ties
6
equal specs
W10 Alpha
9
spec wins
Overall winner
Screen size
Technology
K4 (2017)
GSM / HSPA / LTE
W10 Alpha
GSM / HSPA / LTE
2G bands
K4 (2017)
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only)
W10 Alpha
GSM 850 / 900 / 1800 / 1900
3G bands
K4 (2017)
HSDPA 850 / 900 / 1900 / 2100
W10 Alpha
HSDPA 850 / 900 / 2100
4G bands
K4 (2017)
1, 3, 5, 7, 8, 20
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
equal specsUSB
equal specs5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
W10 Alpha
1, 3, 5, 8, 40, 41
Speed
K4 (2017)
HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps
W10 Alpha
HSPA 42.2/5.76 Mbps, LTE (2CA) Cat13 600/150 Mbps
Announced
K4 (2017)
2016, December. Released 2017, March
W10 Alpha
2020, February 19. Released 2020, February 19
Status
K4 (2017)
Discontinued
W10 Alpha
Discontinued
Dimensions
K4 (2017)
144.7 x 72.6 x 7.9 mm (5.70 x 2.86 x 0.31 in)
W10 Alpha
147.3 x 71 x 8.9 mm (5.80 x 2.80 x 0.35 in)
Weight
K4 (2017)
138 g (4.87 oz)
W10 Alpha
170 g (6.00 oz)
SIM
K4 (2017)
· Nano-SIM· Nano-SIM + Nano-SIM
W10 Alpha
Nano-SIM + Nano-SIM
Type
K4 (2017)
IPS LCD
W10 Alpha
IPS LCD
Size
K4 (2017)
5.0 inches, 69.6 cm2 (~66.3% screen-to-body ratio)
W10 Alpha
5.71 inches, 81.7 cm2 (~78.1% screen-to-body ratio)
Resolution
K4 (2017)
480 x 854 pixels, 16:9 ratio (~195 ppi density)
W10 Alpha
720 x 1512 pixels, 19:9 ratio (~293 ppi density)
Protection
K4 (2017)
Corning Gorilla Glass 3
W10 Alpha
-
OS
K4 (2017)
Android 6.0.1 (Marshmallow)
W10 Alpha
Android 9.0 (Pie)
Chipset
K4 (2017)
Qualcomm MSM8909 Snapdragon 210 (28 nm)
W10 Alpha
Unisoc SC9863A (28 nm)
CPU
K4 (2017)
Quad-core 1.1 GHz Cortex-A7
W10 Alpha
Octa-core (4x1.6 GHz Cortex-A55 & 4x1.2 GHz Cortex-A55)
GPU
K4 (2017)
Adreno 304
W10 Alpha
IMG8322
Card slot
K4 (2017)
microSDHC (dedicated slot)
W10 Alpha
microSDXC (dedicated slot)
Internal
K4 (2017)
8GB/ 16GB (AT&T, Cricket), 1GB RAM
W10 Alpha
32GB 3GB RAM
Other
K4 (2017)
eMMC 4.5
W10 Alpha
eMMC 5.1
Single
K4 (2017)
5 MP, f/2.6, AF
W10 Alpha
8 MP, AF
Features
K4 (2017)
LED flash, HDR
W10 Alpha
LED flash, panorama, HDR
Video
K4 (2017)
720p@30fps
W10 Alpha
1080p@30fps
Single
K4 (2017)
5 MP, f/2.7
W10 Alpha
8 MP
Video
K4 (2017)
720p
W10 Alpha
720p@30fps
Loudspeaker
K4 (2017)
Yes
W10 Alpha
Yes
3.5mm jack
K4 (2017)
Yes
W10 Alpha
Yes
WLAN
K4 (2017)
Wi-Fi 802.11 b/g/n, Wi-Fi Direct
W10 Alpha
Wi-Fi 802.11 b/g/n, Wi-Fi Direct
Bluetooth
K4 (2017)
4.1, A2DP, LE
W10 Alpha
4.1, A2DP, LE
Positioning
K4 (2017)
GPS, GLONASS
W10 Alpha
GPS
NFC
K4 (2017)
No
W10 Alpha
No
Radio
K4 (2017)
FM radio, RDS
W10 Alpha
FM radio
USB
K4 (2017)
microUSB 2.0
W10 Alpha
microUSB 2.0, OTG
Sensors
K4 (2017)
Accelerometer, proximity
W10 Alpha
Accelerometer, proximity
Type
K4 (2017)
Li-Ion 2500 mAh, removable
W10 Alpha
Li-Po 3450 mAh
Colors
K4 (2017)
Black, Titan
W10 Alpha
Black, Blue
Models
K4 (2017)
M160, M153, M151
W10 Alpha
LMX210, LMX210LMW, LM-X210LMW
Price
K4 (2017)
About 100 EUR
W10 Alpha
About 130 EUR