Screen size
C100xWinner: 6.8"+2.9%
X36.6"
Quick verdict
C100x leads the measured specs 10-7.
Measured wins
C100x
10
spec wins
Overall winner
Ties
5
equal specs
X3
7
spec wins
Screen size
Technology
C100x
GSM / HSPA / LTE
X3
GSM / HSPA / LTE
2G bands
C100x
GSM 850 / 900 / 1800 / 1900
X3
GSM 850 / 900 / 1800 / 1900
3G bands
C100x
HSDPA 900 / 2100
X3
HSDPA 850 / 900 / 2100
4G bands
C100x
1, 3, 5, 8, 40
Resolution
Refresh rate
equal specsPeak brightness
Pixel density
CPU speed
RAM
Storage
equal specsMain camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
equal specsUSB
equal specs5G support
equal specsNFC
3.5mm jack
SD card
Stereo speakers
X3
1, 3, 5, 8, 38, 39, 40, 41
Speed
C100x
HSPA, LTE
X3
HSPA, LTE
Announced
C100x
2026, May 07
X3
2020, June 25. Released 2020, June 30
Status
C100x
Released May 15, 2026
X3
Discontinued
Dimensions
C100x
166.5 x 78.2 x 8.6 mm (6.56 x 3.08 x 0.34 in)
X3
163.8 x 75.8 x 8.9 mm (6.45 x 2.98 x 0.35 in)
Weight
C100x
219 g (7.72 oz)
X3
202 g (7.13 oz)
Build
C100x
Glass front, plastic frame, plastic back
X3
Glass front (Gorilla Glass 5), glass back, plastic frame
SIM
C100x
Nano-SIM + Nano-SIM
X3
Nano-SIM + Nano-SIM
Other
C100x
IP64 dust tight and water resistant (water splashes) Drop resistant up to 2m MIL-STD-810H compliant* * does not guarantee ruggedness or use in extreme conditions RGB light on the back (notifications, etc.)
X3
-
Type
C100x
IPS LCD, 120Hz, 900 nits (HBM)
X3
IPS LCD, 120Hz
Size
C100x
6.8 inches, 113.0 cm2 (~86.8% screen-to-body ratio)
X3
6.6 inches, 105.2 cm2 (~84.7% screen-to-body ratio)
Resolution
C100x
720 x 1570 pixels, 19.5:9 ratio (~254 ppi density)
X3
1080 x 2400 pixels, 20:9 ratio (~399 ppi density)
Protection
C100x
ArmorShell glass, Mohs level 5
X3
Corning Gorilla Glass 5
OS
C100x
Android 16
X3
Android 10, upgradable to Android 11, Realme UI 2.0
Chipset
C100x
Unisoc T7250 (12 nm)
X3
Qualcomm SM8150 Snapdragon 855+ (7 nm)
CPU
C100x
Octa-core (2x1.8 GHz Cortex-A75 & 6x1.6 GHz Cortex-A55)
X3
Octa-core (1x2.96 GHz Kryo 485 & 3x2.42 GHz Kryo 485 & 4x1.78 GHz Kryo 485)
GPU
C100x
Mali-G57 MP1
X3
Adreno 640 (700 MHz)
Card slot
C100x
microSDXC
X3
No
Internal
C100x
128GB 4GB RAM, 128GB 6GB RAM, 256GB 4GB RAM, 256GB 6GB RAM
X3
128GB 6GB RAM, 128GB 8GB RAM
Other
C100x
eMMC 5.1
X3
UFS 3.0
Dual
C100x
50 MP, f/1.8, (wide), PDAF Auxiliary lens
X3
-
Features
C100x
LED flash, HDR, panorama
X3
LED flash, HDR, panorama
Video
C100x
1080p@30fps
X3
4K@30/60fps, 1080p@30/60fps, 720p@960fps; gyro-EIS
Quad
C100x
-
X3
64 MP, f/1.8, 26mm (wide), 1/1.72", 0.8µm, PDAF 12 MP, f/2.5, 51mm (telephoto), PDAF, 2x optical zoom 8 MP, f/2.3, 119˚, 16mm (ultrawide), 1/4.0", 1.12µm 2 MP (macro)
Single
C100x
5 MP, f/2.2, (wide)
X3
-
Video
C100x
720p@30fps
X3
1080p@30fps, gyro-EIS
Dual
C100x
-
X3
16 MP, f/2.0, 26mm (wide), 1/3.06", 1.0µm 8 MP, f/2.2, 105˚ (ultrawide), 1/4.0", 1.12µm
Features
C100x
-
X3
Panorama
Loudspeaker
C100x
Yes
X3
Yes
3.5mm jack
C100x
Yes
X3
No
Other
C100x
-
X3
24-bit/192kHz Hi-Res audio
WLAN
C100x
Wi-Fi 802.11 a/b/g/n/ac, dual-band
X3
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Bluetooth
C100x
5.2, A2DP, LE
X3
5.0, A2DP, LE
Positioning
C100x
GPS, GALILEO, GLONASS, BDS
X3
GPS (L1+L5), GLONASS, BDS, GALILEO, QZSS
NFC
C100x
Yes (market/region dependent)
X3
No
Radio
C100x
Unspecified
X3
No
USB
C100x
USB Type-C 2.0, OTG
X3
USB Type-C 2.0
Sensors
C100x
Fingerprint (side-mounted), accelerometer, proximity, compass
X3
Fingerprint (side-mounted), accelerometer, gyro, proximity, compass
Type
C100x
Si/C Li-Ion 8000 mAh
X3
4200 mAh
Charging
C100x
45W wired, 45W PPS, 13.5W PD Reverse wired
X3
30W wired, 100% in 55 min
Colors
C100x
Golden Coast, Deepblue Tides
X3
Glacier Blue, Arctic White
Models
C100x
RMX5366
X3
RMX2142, RMX2081, RMX2085, RMX2083
Price
C100x
About 160 EUR
X3
About 290 EUR