Screen size
C100xWinner: 6.8"+7.4%
U16.3"
Quick verdict
C100x leads the measured specs 12-6.
Measured wins
C100x
12
spec wins
Overall winner
Ties
4
equal specs
U1
6
spec wins
Screen size
Technology
C100x
GSM / HSPA / LTE
U1
GSM / HSPA / LTE
2G bands
C100x
GSM 850 / 900 / 1800 / 1900
U1
GSM 850 / 900 / 1800 / 1900
3G bands
C100x
HSDPA 900 / 2100
U1
HSDPA 850 / 900 / 2100
4G bands
C100x
1, 3, 5, 8, 40
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
equal specsNFC
3.5mm jack
equal specsSD card
equal specsStereo speakers
U1
1, 3, 5, 8, 38, 40, 41
Speed
C100x
HSPA, LTE
U1
HSPA 42.2/5.76 Mbps, LTE Cat6 300/50 Mbps
Announced
C100x
2026, May 07
U1
2018, November. Released 2018, December
Status
C100x
Released May 15, 2026
U1
Discontinued
Dimensions
C100x
166.5 x 78.2 x 8.6 mm (6.56 x 3.08 x 0.34 in)
U1
157 x 74 x 8 mm (6.18 x 2.91 x 0.31 in)
Weight
C100x
219 g (7.72 oz)
U1
168 g (5.93 oz)
Build
C100x
Glass front, plastic frame, plastic back
U1
Glass front (Gorilla Glass 3), plastic back, plastic frame
SIM
C100x
Nano-SIM + Nano-SIM
U1
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.)
U1
-
Type
C100x
IPS LCD, 120Hz, 900 nits (HBM)
U1
IPS LCD
Size
C100x
6.8 inches, 113.0 cm2 (~86.8% screen-to-body ratio)
U1
6.3 inches, 97.4 cm2 (~83.9% screen-to-body ratio)
Resolution
C100x
720 x 1570 pixels, 19.5:9 ratio (~254 ppi density)
U1
1080 x 2340 pixels, 19.5:9 ratio (~409 ppi density)
Protection
C100x
ArmorShell glass, Mohs level 5
U1
Corning Gorilla Glass 3
OS
C100x
Android 16
U1
Android 8.1 (Oreo), upgradable to Android 9.0 (Pie), ColorOS 6
Chipset
C100x
Unisoc T7250 (12 nm)
U1
Mediatek MT6771 Helio P70 (12 nm)
CPU
C100x
Octa-core (2x1.8 GHz Cortex-A75 & 6x1.6 GHz Cortex-A55)
U1
Octa-core (4x2.1 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53)
GPU
C100x
Mali-G57 MP1
U1
Mali-G72 MP3
Card slot
C100x
microSDXC
U1
microSDXC (dedicated slot)
Internal
C100x
128GB 4GB RAM, 128GB 6GB RAM, 256GB 4GB RAM, 256GB 6GB RAM
U1
32GB 3GB RAM, 64GB 3GB RAM, 64GB 4GB RAM
Other
C100x
eMMC 5.1
U1
eMMC 5.1
Dual
C100x
50 MP, f/1.8, (wide), PDAF Auxiliary lens
U1
13 MP, f/2.2, AF Auxiliary lens
Features
C100x
LED flash, HDR, panorama
U1
LED flash, HDR, panorama
Video
C100x
1080p@30fps
U1
1080p@30fps, 720p@90fps
Single
C100x
5 MP, f/2.2, (wide)
U1
25 MP, f/2.0, 1/2.8", 0.9µm
Video
C100x
720p@30fps
U1
1080p@30fps
Features
C100x
-
U1
HDR
Loudspeaker
C100x
Yes
U1
Yes
3.5mm jack
C100x
Yes
U1
Yes
WLAN
C100x
Wi-Fi 802.11 a/b/g/n/ac, dual-band
U1
Wi-Fi 802.11 b/g/n, Wi-Fi Direct
Bluetooth
C100x
5.2, A2DP, LE
U1
4.2, A2DP, LE
Positioning
C100x
GPS, GALILEO, GLONASS, BDS
U1
GPS, GLONASS
NFC
C100x
Yes (market/region dependent)
U1
No
Radio
C100x
Unspecified
U1
FM radio
USB
C100x
USB Type-C 2.0, OTG
U1
microUSB 2.0, OTG
Sensors
C100x
Fingerprint (side-mounted), accelerometer, proximity, compass
U1
Fingerprint (rear-mounted), accelerometer, proximity, compass
Type
C100x
Si/C Li-Ion 8000 mAh
U1
Li-Ion 3500 mAh, non-removable
Charging
C100x
45W wired, 45W PPS, 13.5W PD Reverse wired
U1
10W wired
Colors
C100x
Golden Coast, Deepblue Tides
U1
Ambitious Black, Brave Blue, Fiery Gold
Models
C100x
RMX5366
U1
RMX1831, RMX1833
Price
C100x
About 160 EUR
U1
About 130 EUR