Screen size
K15xWinner: 6.8"+41%
R821T FInd Muse4.0"
Quick verdict
K15x leads the measured specs 18-1.
Measured wins
K15x
18
spec wins
Overall winner
Ties
3
equal specs
R821T FInd Muse
1
spec wins
Screen size
Technology
K15x
GSM / HSPA / LTE / 5G
R821T FInd Muse
GSM / HSPA
2G bands
K15x
GSM 850 / 900 / 1800 / 1900
R821T FInd Muse
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands
K15x
HSDPA 850 / 900 / 2100
R821T FInd Muse
HSDPA 2100
4G bands
K15x
1, 3, 5, 8, 28, 34, 38, 39, 40, 41
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
USB
equal specs5G support
NFC
3.5mm jack
equal specsSD card
equal specsStereo speakers
R821T FInd Muse
-
5G bands
K15x
1, 3, 5, 8, 28, 41, 48, 77, 78 SA/NSA
R821T FInd Muse
-
Speed
K15x
HSPA, LTE, 5G
R821T FInd Muse
HSPA
Announced
K15x
2026, October 02
R821T FInd Muse
2013. Released 2013
Status
K15x
Available. Released 2026, October 02
R821T FInd Muse
Discontinued
Dimensions
K15x
166.6 x 78.5 x 8.6 mm (6.56 x 3.09 x 0.34 in)
R821T FInd Muse
123 x 63.5 x 9.9 mm (4.84 x 2.5 x 0.39 in)
Weight
K15x
212 g (7.48 oz)
R821T FInd Muse
-
Build
K15x
Glass front, plastic frame, plastic back
R821T FInd Muse
-
SIM
K15x
Nano-SIM + Nano-SIM
R821T FInd Muse
Dual SIM (Mini-SIM, dual stand-by)
Other
K15x
IP64 dust tight and water resistant (water splashes)
R821T FInd Muse
-
Type
K15x
IPS LCD, 120Hz, 1125 nits (peak)
R821T FInd Muse
IPS LCD
Size
K15x
6.75 inches, 111.4 cm2 (~85.2% screen-to-body ratio)
R821T FInd Muse
4.0 inches, 45.5 cm2 (~58.3% screen-to-body ratio)
Resolution
K15x
720 x 1570 pixels, 19.5:9 ratio (~256 ppi density)
R821T FInd Muse
480 x 800 pixels, 5:3 ratio (~233 ppi density)
OS
K15x
Android 16, ColorOS 16
R821T FInd Muse
Android 4.2 (Jelly Bean)
Chipset
K15x
Mediatek Dimensity 6300 (6 nm)
R821T FInd Muse
Mediatek MT6572 (28 nm)
CPU
K15x
Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)
R821T FInd Muse
Dual-core 1.2 GHz Cortex-A7
GPU
K15x
Mali-G57 MC2
R821T FInd Muse
Mali-400
Card slot
K15x
microSDXC
R821T FInd Muse
microSDHC (dedicated slot)
Internal
K15x
128GB 6GB RAM, 256GB 6GB RAM
R821T FInd Muse
4GB 512MB RAM
Other
K15x
UFS 2.2
R821T FInd Muse
-
Dual
K15x
13 MP, f/2.2, 27mm (wide), AF Auxiliary lens
R821T FInd Muse
-
Features
K15x
LED flash, HDR, panorama
R821T FInd Muse
-
Video
K15x
1080p@30/60fps
R821T FInd Muse
Yes
Single
K15x
-
R821T FInd Muse
3.15 MP
Single
K15x
5 MP, f/2.2, 27mm (wide)
R821T FInd Muse
VGA
Features
K15x
Panorama
R821T FInd Muse
-
Video
K15x
1080p@30fps
R821T FInd Muse
Loudspeaker
K15x
Yes
R821T FInd Muse
Yes
3.5mm jack
K15x
Yes
R821T FInd Muse
Yes
WLAN
K15x
Wi-Fi 802.11 a/b/g/n/ac, dual-band
R821T FInd Muse
Wi-Fi 802.11 b/g, hotspot
Bluetooth
K15x
5.4, A2DP, LE, aptX HD
R821T FInd Muse
Yes
Positioning
K15x
GPS, GALILEO, GLONASS, QZSS
R821T FInd Muse
GPS
NFC
K15x
Yes
R821T FInd Muse
No
Radio
K15x
No
R821T FInd Muse
FM radio
USB
K15x
USB Type-C 2.0, OTG
R821T FInd Muse
microUSB 2.0
Sensors
K15x
Fingerprint (side-mounted), accelerometer, proximity, compass
R821T FInd Muse
Accelerometer, proximity
Type
K15x
6500 mAh
R821T FInd Muse
Li-Ion 1700 mAh, removable
Charging
K15x
45W wired 5W reverse wired
R821T FInd Muse
-
Colors
K15x
Purple, White
R821T FInd Muse
White
Models
K15x
PLT150
R821T FInd Muse
-
Price
K15x
About 230 EUR
R821T FInd Muse
About 290 EUR