Screen size
K42Winner: 6.6"+1.5%
Q516.5"
Quick verdict
K42 leads the measured specs 6-2.
Measured wins
K42
6
spec wins
Overall winner
Ties
11
equal specs
Q51
2
spec wins
Screen size
Technology
K42
GSM / HSPA / LTE
Q51
GSM / HSPA / LTE
2G bands
K42
GSM 850 / 900 / 1800 / 1900
Q51
GSM 850 / 900 / 1800 / 1900
3G bands
K42
HSDPA 850 / 900 / 1900 / 2100
Q51
HSDPA 850 / 900 / 1900 / 2100
4G bands
K42
1, 3, 7, 8, 20, 28, 38 - Europe, 1, 3, 5, 7, 8, 20, 28, 38, 39, 40, 41 - Australia
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
equal specsRAM
equal specsStorage
Main camera
equal specsFront camera
Battery
equal specsWired charging
Weight
Thickness
equal specsIP rating
Wi‑Fi
Bluetooth
equal specsUSB
equal specs5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
Q51
1, 3, 7, 8, 20
Speed
K42
Yes, 384 kbps
Q51
HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/75 Mbps
Announced
K42
2020, September 21. Released 2020, September 21
Q51
2020, February 25. Released 2020, February 26
Status
K42
Discontinued
Q51
Discontinued
Dimensions
K42
165 x 76.7 x 8.4 mm (6.50 x 3.02 x 0.33 in)
Q51
164.5 x 77.5 x 8.4 mm (6.48 x 3.05 x 0.33 in)
Weight
K42
182 g (6.42 oz)
Q51
-
SIM
K42
Nano-SIM + Nano-SIM
Q51
Nano-SIM + Nano-SIM
Other
K42
MIL-STD-810G compliant* *does not guarantee ruggedness or use in extreme conditions
Q51
MIL-STD-810G compliant* *does not guarantee ruggedness or use in extreme conditions
Type
K42
IPS LCD
Q51
IPS LCD
Size
K42
6.6 inches, 105.2 cm2 (~83.1% screen-to-body ratio)
Q51
6.5 inches, 105.5 cm2 (~82.7% screen-to-body ratio)
Resolution
K42
720 x 1600 pixels, 20:9 ratio (~266 ppi density)
Q51
720 x 1520 pixels, 19:9 ratio (~259 ppi density)
OS
K42
Android 10, upgradable to Android 11
Q51
Android 10
Chipset
K42
Mediatek MT6762 Helio P22 (12 nm)
Q51
Mediatek MT6762 Helio P22 (12 nm)
CPU
K42
Octa-core 2.0 GHz Cortex-A53
Q51
Octa-core 2.0 GHz Cortex-A53
GPU
K42
PowerVR GE8320
Q51
PowerVR GE8320
Card slot
K42
microSDXC
Q51
microSDXC (dedicated slot)
Internal
K42
64GB 3GB RAM
Q51
32GB 3GB RAM
Other
K42
eMMC 5.1
Q51
eMMC 5.1
Quad
K42
13 MP, 27mm (wide), 1/3.1", 1.12µm, PDAF 5 MP, f/2.2, 115˚ (ultrawide), 1/5.0", 1.12µm 2 MP (macro) Auxiliary lens
Q51
-
Features
K42
LED flash, panorama, HDR
Q51
LED flash, panorama, HDR
Video
K42
1080p@30fps
Q51
1080p@30fps
Triple
K42
-
Q51
13 MP, (wide), PDAF 5 MP, 13mm (ultrawide) Auxiliary lens
Single
K42
8 MP, (wide)
Q51
13 MP, (wide), 1/3.1", 1.12µm
Video
K42
1080p@30fps
Q51
1080p@30fps
Loudspeaker
K42
Yes
Q51
Yes, with stereo speakers
3.5mm jack
K42
Yes
Q51
Yes
WLAN
K42
Wi-Fi 802.11 b/g/n, Wi-Fi Direct
Q51
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNA
Bluetooth
K42
5.0, A2DP, LE
Q51
5.0, A2DP, LE
Positioning
K42
GPS
Q51
GPS
NFC
K42
Yes (market/region dependent)
Q51
Yes
Radio
K42
No
Q51
No
USB
K42
USB Type-C 2.0, OTG
Q51
USB Type-C 2.0
Sensors
K42
Fingerprint (side-mounted), accelerometer, proximity, compass
Q51
Fingerprint (rear-mounted), accelerometer, proximity, compass
Type
K42
Li-Po 4000 mAh
Q51
Li-Po 4000 mAh
Charging
K42
10W wired
Q51
-
Colors
K42
Gray, Green
Q51
Frozen White, Moonlight Titanium
Models
K42
LMK420, LM-K420, LMK420H, LM-K420H, LMK420E, LM-K420E, LMK420Y, LM-K420Y
Q51
LM-Q510N
Price
K42
About 140 EUR
Q51
About 240 EUR