Screen size
A316.5"
K15xWinner: 6.8"+3.7%
Quick verdict
K15x leads the measured specs 13-5.
Measured wins
A31
5
spec wins
Ties
4
equal specs
K15x
13
spec wins
Overall winner
Screen size
Technology
A31
GSM / HSPA / LTE
K15x
GSM / HSPA / LTE / 5G
2G bands
A31
GSM 850 / 900 / 1800 / 1900
K15x
GSM 850 / 900 / 1800 / 1900
3G bands
A31
HSDPA 850 / 900 / 2100 - International, HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 - USA
K15x
HSDPA 850 / 900 / 2100
4G bands
A31
1, 3, 5, 7, 8, 20, 28, 38, 40, 41 - International, 1, 2, 3, 4, 5, 7, 8, 28, 38, 41, 66 - USA, 1, 3, 5, 8, 38, 40, 41 - India, 1, 3, 5, 7, 8, 38, 40, 41 - Asia
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
NFC
3.5mm jack
equal specsSD card
equal specsStereo speakers
K15x
1, 3, 5, 8, 28, 34, 38, 39, 40, 41
Speed
A31
HSPA, LTE
K15x
HSPA, LTE, 5G
5G bands
A31
-
K15x
1, 3, 5, 8, 28, 41, 48, 77, 78 SA/NSA
Announced
A31
2020, February 13. Released 2020, February 14
K15x
2026, October 02
Status
A31
Discontinued
K15x
Available. Released 2026, October 02
Dimensions
A31
163.9 x 75.5 x 8.3 mm (6.45 x 2.97 x 0.33 in)
K15x
166.6 x 78.5 x 8.6 mm (6.56 x 3.09 x 0.34 in)
Weight
A31
180 g (6.35 oz)
K15x
212 g (7.48 oz)
Build
A31
Glass front (Gorilla Glass 3), plastic back, plastic frame
K15x
Glass front, plastic frame, plastic back
SIM
A31
Nano-SIM + Nano-SIM
K15x
Nano-SIM + Nano-SIM
Other
A31
-
K15x
IP64 dust tight and water resistant (water splashes)
Type
A31
IPS LCD, 480 nits (typ)
K15x
IPS LCD, 120Hz, 1125 nits (peak)
Size
A31
6.5 inches, 102.0 cm2 (~82.4% screen-to-body ratio)
K15x
6.75 inches, 111.4 cm2 (~85.2% screen-to-body ratio)
Resolution
A31
720 x 1600 pixels, 20:9 ratio (~270 ppi density)
K15x
720 x 1570 pixels, 19.5:9 ratio (~256 ppi density)
Protection
A31
Corning Gorilla Glass 3
K15x
-
OS
A31
Android 9.0 (Pie), ColorOS 6.1
K15x
Android 16, ColorOS 16
Chipset
A31
Mediatek MT6765V/CB Helio P35 (12 nm)
K15x
Mediatek Dimensity 6300 (6 nm)
CPU
A31
Octa-core (4x2.3 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53)
K15x
Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)
GPU
A31
PowerVR GE8320
K15x
Mali-G57 MC2
Card slot
A31
microSDXC (dedicated slot)
K15x
microSDXC
Internal
A31
64GB 4GB RAM, 128GB 4GB RAM, 128GB 6GB RAM
K15x
128GB 6GB RAM, 256GB 6GB RAM
Other
A31
eMMC 5.1
K15x
UFS 2.2
Triple
A31
12 MP, f/1.8, (wide), 1/2.86", 1.25µm, PDAF 2 MP (macro) Auxiliary lens
K15x
-
Features
A31
LED flash, HDR, panorama
K15x
LED flash, HDR, panorama
Video
A31
1080p@30fps
K15x
1080p@30/60fps
Dual
A31
-
K15x
13 MP, f/2.2, 27mm (wide), AF Auxiliary lens
Single
A31
8 MP, f/2.0, (wide), 1/4.0", 1.12µm
K15x
5 MP, f/2.2, 27mm (wide)
Features
A31
HDR
K15x
Panorama
Video
A31
1080p@30fps
K15x
1080p@30fps
Loudspeaker
A31
Yes
K15x
Yes
3.5mm jack
A31
Yes
K15x
Yes
WLAN
A31
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
K15x
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Bluetooth
A31
5.0, A2DP, LE
K15x
5.4, A2DP, LE, aptX HD
Positioning
A31
GPS, GLONASS, BDS
K15x
GPS, GALILEO, GLONASS, QZSS
NFC
A31
No
K15x
Yes
Radio
A31
FM radio
K15x
No
USB
A31
microUSB 2.0, OTG
K15x
USB Type-C 2.0, OTG
Sensors
A31
Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass
K15x
Fingerprint (side-mounted), accelerometer, proximity, compass
Type
A31
Li-Po 4230 mAh
K15x
6500 mAh
Charging
A31
-
K15x
45W wired 5W reverse wired
Colors
A31
Fantasy White, Mystery Black, Lake Green
K15x
Purple, White
Models
A31
CPH2015, CPH2073, CPH2081, CPH2029, CPH2031
K15x
PLT150
Price
A31
$ 71.14
K15x
About 230 EUR