Screen size
A77 (Mediatek)5.5"
K15xWinner: 6.8"+19%
Quick verdict
K15x leads the measured specs 13-5.
Measured wins
A77 (Mediatek)
5
spec wins
Ties
4
equal specs
K15x
13
spec wins
Overall winner
Screen size
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
equal specsFront camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
equal specs5G support
NFC
3.5mm jack
equal specsSD card
equal specsStereo speakers
Technology
A77 (Mediatek)
GSM / HSPA / LTE
K15x
GSM / HSPA / LTE / 5G
2G bands
A77 (Mediatek)
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
K15x
GSM 850 / 900 / 1800 / 1900
3G bands
A77 (Mediatek)
HSDPA 850 / 900 / 1900 / 2100
K15x
HSDPA 850 / 900 / 2100
4G bands
A77 (Mediatek)
LTE
K15x
1, 3, 5, 8, 28, 34, 38, 39, 40, 41
Speed
A77 (Mediatek)
HSPA, LTE
K15x
HSPA, LTE, 5G
5G bands
A77 (Mediatek)
-
K15x
1, 3, 5, 8, 28, 41, 48, 77, 78 SA/NSA
Announced
A77 (Mediatek)
2017, May. Released 2017, May
K15x
2026, October 02
Status
A77 (Mediatek)
Discontinued
K15x
Available. Released 2026, October 02
Dimensions
A77 (Mediatek)
153.3 x 75.2 x 7.3 mm (6.04 x 2.96 x 0.29 in)
K15x
166.6 x 78.5 x 8.6 mm (6.56 x 3.09 x 0.34 in)
Weight
A77 (Mediatek)
153 g (5.40 oz)
K15x
212 g (7.48 oz)
SIM
A77 (Mediatek)
Nano-SIM + Nano-SIM
K15x
Nano-SIM + Nano-SIM
Build
A77 (Mediatek)
-
K15x
Glass front, plastic frame, plastic back
Other
A77 (Mediatek)
-
K15x
IP64 dust tight and water resistant (water splashes)
Type
A77 (Mediatek)
IPS LCD
K15x
IPS LCD, 120Hz, 1125 nits (peak)
Size
A77 (Mediatek)
5.5 inches, 83.4 cm2 (~72.3% screen-to-body ratio)
K15x
6.75 inches, 111.4 cm2 (~85.2% screen-to-body ratio)
Resolution
A77 (Mediatek)
1080 x 1920 pixels, 16:9 ratio (~401 ppi density)
K15x
720 x 1570 pixels, 19.5:9 ratio (~256 ppi density)
OS
A77 (Mediatek)
Android 6 (Marshmallow), ColorOS 3
K15x
Android 16, ColorOS 16
Chipset
A77 (Mediatek)
Mediatek MT6750T (28 nm)
K15x
Mediatek Dimensity 6300 (6 nm)
CPU
A77 (Mediatek)
Octa-core (4x1.5 GHz Cortex-A53 & 4x1.0 GHz Cortex-A53)
K15x
Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)
GPU
A77 (Mediatek)
Mali-T860MP2
K15x
Mali-G57 MC2
Card slot
A77 (Mediatek)
microSDXC (uses shared SIM slot)
K15x
microSDXC
Internal
A77 (Mediatek)
64GB 4GB RAM
K15x
128GB 6GB RAM, 256GB 6GB RAM
Other
A77 (Mediatek)
eMMC 5.1
K15x
UFS 2.2
Single
A77 (Mediatek)
13 MP, f/2.2, PDAF
K15x
-
Features
A77 (Mediatek)
LED flash, HDR, panorama
K15x
LED flash, HDR, panorama
Video
A77 (Mediatek)
1080p@30fps
K15x
1080p@30/60fps
Dual
A77 (Mediatek)
-
K15x
13 MP, f/2.2, 27mm (wide), AF Auxiliary lens
Single
A77 (Mediatek)
16 MP, f/2.0, 26mm (wide), 1/3.06", 1.0µm
K15x
5 MP, f/2.2, 27mm (wide)
Video
A77 (Mediatek)
1080p@30fps
K15x
1080p@30fps
Features
A77 (Mediatek)
-
K15x
Panorama
Loudspeaker
A77 (Mediatek)
Yes
K15x
Yes
3.5mm jack
A77 (Mediatek)
Yes
K15x
Yes
WLAN
A77 (Mediatek)
Wi-Fi 802.11 a/b/g/n, Wi-Fi Direct
K15x
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Bluetooth
A77 (Mediatek)
4.0, A2DP
K15x
5.4, A2DP, LE, aptX HD
Positioning
A77 (Mediatek)
GPS
K15x
GPS, GALILEO, GLONASS, QZSS
NFC
A77 (Mediatek)
No
K15x
Yes
Radio
A77 (Mediatek)
No
K15x
No
USB
A77 (Mediatek)
microUSB 2.0, OTG
K15x
USB Type-C 2.0, OTG
Sensors
A77 (Mediatek)
Fingerprint (front-mounted), accelerometer, proximity, compass
K15x
Fingerprint (side-mounted), accelerometer, proximity, compass
Type
A77 (Mediatek)
Li-Ion 3200 mAh, non-removable
K15x
6500 mAh
Charging
A77 (Mediatek)
-
K15x
45W wired 5W reverse wired
Colors
A77 (Mediatek)
Gold, Rose Gold, Black
K15x
Purple, White
Price
A77 (Mediatek)
About 310 EUR
K15x
About 230 EUR
Models
A77 (Mediatek)
-
K15x
PLT150