Screen size
F1s5.5"
K15xWinner: 6.8"+19%
Quick verdict
K15x leads the measured specs 14-4.
Measured wins
F1s
4
spec wins
Ties
4
equal specs
K15x
14
spec wins
Overall winner
Screen size
Technology
F1s
GSM / HSPA / LTE
K15x
GSM / HSPA / LTE / 5G
2G bands
F1s
GSM 850 / 900 / 1800 / 1900
K15x
GSM 850 / 900 / 1800 / 1900
3G bands
F1s
HSDPA 850 / 900 / 2100
K15x
HSDPA 850 / 900 / 2100
4G bands
F1s
1, 3, 5, 7, 8, 20, 28, 38, 39, 40, 41 - Global, 1, 3, 5, 40 - India
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
K15x
1, 3, 5, 8, 28, 34, 38, 39, 40, 41
Speed
F1s
HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps or LTE Cat4 150/50 Mbps
K15x
HSPA, LTE, 5G
5G bands
F1s
-
K15x
1, 3, 5, 8, 28, 41, 48, 77, 78 SA/NSA
Announced
F1s
2016, August 03. Released 2016, August
K15x
2026, October 02
Status
F1s
Discontinued
K15x
Available. Released 2026, October 02
Dimensions
F1s
154.5 x 76 x 7.4 mm (6.08 x 2.99 x 0.29 in)
K15x
166.6 x 78.5 x 8.6 mm (6.56 x 3.09 x 0.34 in)
Weight
F1s
160 g (5.64 oz)
K15x
212 g (7.48 oz)
Build
F1s
Glass front (Gorilla Glass 4), aluminum back, aluminum frame
K15x
Glass front, plastic frame, plastic back
SIM
F1s
Nano-SIM + Nano-SIM
K15x
Nano-SIM + Nano-SIM
Other
F1s
-
K15x
IP64 dust tight and water resistant (water splashes)
Type
F1s
IPS LCD
K15x
IPS LCD, 120Hz, 1125 nits (peak)
Size
F1s
5.5 inches, 83.4 cm2 (~71.0% screen-to-body ratio)
K15x
6.75 inches, 111.4 cm2 (~85.2% screen-to-body ratio)
Resolution
F1s
720 x 1280 pixels, 16:9 ratio (~267 ppi density)
K15x
720 x 1570 pixels, 19.5:9 ratio (~256 ppi density)
Protection
F1s
Corning Gorilla Glass 4
K15x
-
OS
F1s
Android 5.1 (Lollipop), upgradable to 6.0 (Marshmallow), ColorOS 3
K15x
Android 16, ColorOS 16
Chipset
F1s
Mediatek MT6755 (28 nm) or MTK7650 (28 nm)
K15x
Mediatek Dimensity 6300 (6 nm)
CPU
F1s
Octa-core 1.5 GHz Cortex-A53
K15x
Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)
GPU
F1s
Mali-T860MP2
K15x
Mali-G57 MC2
Card slot
F1s
microSDXC (dedicated slot)
K15x
microSDXC
Internal
F1s
32GB 3GB RAM, 64GB 4GB RAM
K15x
128GB 6GB RAM, 256GB 6GB RAM
Other
F1s
eMMC 5.1
K15x
UFS 2.2
Single
F1s
13 MP, f/2.2, 1/3.0", PDAF
K15x
-
Features
F1s
LED flash, panorama, HDR
K15x
LED flash, HDR, panorama
Video
F1s
1080p@30fps
K15x
1080p@30/60fps
Dual
F1s
-
K15x
13 MP, f/2.2, 27mm (wide), AF Auxiliary lens
Single
F1s
16 MP, f/2.0, 26mm (wide), 1/3.06", 1.0µm
K15x
5 MP, f/2.2, 27mm (wide)
Video
F1s
1080p@30fps
K15x
1080p@30fps
Features
F1s
-
K15x
Panorama
Loudspeaker
F1s
Yes
K15x
Yes
3.5mm jack
F1s
Yes
K15x
Yes
WLAN
F1s
Wi-Fi 802.11 a/b/g/n, dual-band, Wi-Fi Direct, hotspot
K15x
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Bluetooth
F1s
4.0, A2DP
K15x
5.4, A2DP, LE, aptX HD
Positioning
F1s
GPS
K15x
GPS, GALILEO, GLONASS, QZSS
NFC
F1s
No
K15x
Yes
Radio
F1s
FM radio
K15x
No
USB
F1s
microUSB 2.0, OTG
K15x
USB Type-C 2.0, OTG
Sensors
F1s
Fingerprint (front-mounted), accelerometer, proximity, compass
K15x
Fingerprint (side-mounted), accelerometer, proximity, compass
Type
F1s
Li-Po 3075 mAh, non-removable
K15x
6500 mAh
Charging
F1s
-
K15x
45W wired 5W reverse wired
Colors
F1s
Gold, Rose Gold, Gray
K15x
Purple, White
Models
F1s
A1601
K15x
PLT150
SAR
F1s
0.31 W/kg (head) 0.36 W/kg (body)
K15x
-
SAR EU
F1s
1.60 W/kg (head) 1.05 W/kg (body)
K15x
-
Price
F1s
About 150 EUR
K15x
About 230 EUR