Screen size
K51S6.6"
K71Winner: 6.8"+3.7%
Quick verdict
K71 leads the measured specs 8-3.
Measured wins
K51S
3
spec wins
Ties
7
equal specs
K71
8
spec wins
Overall winner
Screen size
Technology
K51S
GSM / HSPA / LTE
K71
GSM / HSPA / LTE
2G bands
K51S
GSM 850 / 900 / 1800 / 1900
K71
GSM 850 / 900 / 1800 / 1900
3G bands
K51S
HSDPA 850 / 900 / 1900 / 2100
K71
HSDPA 850 / 900 / 1900 / 2100
4G bands
K51S
1, 3, 7, 8, 20, 28, 38
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
equal specsRAM
Storage
Main camera
Front camera
Battery
equal specsWired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
equal specsUSB
equal specs5G support
equal specsNFC
3.5mm jack
equal specsSD card
equal specsStereo speakers
K71
LTE
Speed
K51S
HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps
K71
HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps
Announced
K51S
2020, February 18. Released 2020, April 27
K71
2020, September 21. Released 2020, September 21
Status
K51S
Discontinued
K71
Discontinued
Dimensions
K51S
165.2 x 76.7 x 8.3 mm (6.50 x 3.02 x 0.33 in)
K71
171.4 x 77.7 x 8.7 mm (6.75 x 3.06 x 0.34 in)
Weight
K51S
194.5 g (6.88 oz)
K71
220 g (7.76 oz)
SIM
K51S
· Nano-SIM· Nano-SIM + Nano-SIM
K71
Nano-SIM
Other
K51S
MIL-STD-810G compliant* *does not guarantee ruggedness or use in extreme conditions
K71
Stylus
Type
K51S
IPS LCD
K71
IPS LCD
Size
K51S
6.55 inches, 93.6 cm2 (~73.8% screen-to-body ratio)
K71
6.8 inches, 109.8 cm2 (~82.5% screen-to-body ratio)
Resolution
K51S
720 x 1600 pixels, 20:9 ratio (~282 ppi density)
K71
1080 x 2460 pixels (~395 ppi density)
Protection
K51S
Scratch-resistant glass
K71
-
OS
K51S
Android 9.0 (Pie)
K71
Android 10
Chipset
K51S
Mediatek MT6765 Helio P35 (12 nm)
K71
Mediatek MT6765 Helio P35 (12 nm)
CPU
K51S
Octa-core (4x2.3 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53)
K71
Octa-core (4x2.3 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53)
GPU
K51S
PowerVR GE8320
K71
PowerVR GE8320
Card slot
K51S
microSDXC (dedicated slot)
K71
microSDXC (dedicated slot)
Internal
K51S
64GB 3GB RAM
K71
128GB 4GB RAM
Other
K51S
eMMC 5.1
K71
-
Quad
K51S
32 MP, (wide), PDAF 5 MP, f/2.2, 115˚, (ultrawide) 2 MP (macro) Auxiliary lens
K71
-
Features
K51S
LED flash, panorama, HDR
K71
LED flash, panorama, HDR
Video
K51S
1080p@30fps
K71
1080p@30fps
Triple
K51S
-
K71
48 MP, (wide), 1/2.0", 0.8µm, PDAF 5 MP, 120˚, (ultrawide) Auxiliary lens
Single
K51S
13 MP, 1/3.1", 1.12µm
K71
32 MP, (wide), 1/2.8", 0.8µm
Video
K51S
1080p@30fps
K71
1080p@30fps
Loudspeaker
K51S
Yes
K71
Yes, with stereo speakers
3.5mm jack
K51S
Yes
K71
Yes
WLAN
K51S
Wi-Fi 802.11 a/b/g/n, Wi-Fi Direct, DLNAorWi-Fi 802.11 b/g/n, Wi-Fi Direct, DLNA
K71
Wi-Fi 802.11 b/g/n, Wi-Fi Direct
Bluetooth
K51S
5.0, A2DP, LE
K71
5.0, A2DP, LE
Positioning
K51S
GPS
K71
GPS
NFC
K51S
Yes
K71
No
Radio
K51S
No
K71
No
USB
K51S
USB Type-C 2.0, OTG
K71
USB Type-C 2.0
Sensors
K51S
Fingerprint (rear-mounted), accelerometer, proximity, compass
K71
Fingerprint (rear-mounted), accelerometer, proximity
Type
K51S
Li-Po 4000 mAh
K71
Li-Po 4000 mAh
Colors
K51S
Titanium, Pink, Blue, Red
K71
White
Models
K51S
LMK510EMW, LM-K510EMW, LM-K510
K71
LMQ730HA, LM-Q730HA
Price
K51S
About 200 EUR
K71
-