Screen size
C211.3"
X1Winner: 2.1"+38%
Quick verdict
X1 leads the measured specs 4-3.
Measured wins
C21
3
spec wins
Ties
4
equal specs
X1
4
spec wins
Overall winner
Screen size
Technology
C21
No cellular connectivity
X1
No cellular connectivity
2G bands
C21
N/A
X1
N/A
3G bands
C21
N/A
X1
N/A
4G bands
C21
N/A
X1
N/A
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
5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
Speed
C21
No
X1
No
GPRS
C21
No
X1
No
EDGE
C21
No
X1
No
Announced
C21
2023, November
X1
2024, May
Status
C21
Available. Released 2023, November
X1
Available. Released 2024, May
Dimensions
C21
46.5 x 46.5 x 13 mm (1.83 x 1.83 x 0.51 in)
X1
52.7 x 44.5 x 14.2 mm (2.07 x 1.75 x 0.56 in)
Weight
C21
-
X1
-
Build
C21
Zinc alloy frame
X1
-
SIM
C21
No
X1
No
Other
C21
IP68 dust tight and water resistant (immersible up to 1.5m for 30 min)
X1
Waterproof (2ATM) 20m
Type
C21
TFT LCD
X1
AMOLED
Size
C21
1.32 inches
X1
2.13 inches
Resolution
C21
360 x 360 pixels (~386 ppi density)
X1
410 x 502 pixels (~304 ppi density)
Protection
C21
Corning Gorilla Glass
X1
Tempered glass
OS
C21
Proprietary OS
X1
Proprietary OS
Card slot
C21
No
X1
No
Internal
C21
128MB
X1
Unspecified
Other
C21
No
X1
No
Loudspeaker
C21
No
X1
Yes
3.5mm jack
C21
No
X1
No
WLAN
C21
No
X1
No
Bluetooth
C21
5.0, A2DP
X1
5.2
Positioning
C21
No
X1
No
NFC
C21
No
X1
No
Radio
C21
No
X1
No
USB
C21
No
X1
No
Sensors
C21
Accelerometer, heart rate, SpO2, blood pressure
X1
Accelerometer, heart rate, SpO2, blood pressure, barometer, compass
Type
C21
300 mAh
X1
850 mAh
Colors
C21
Black, Silver
X1
Gray
Price
C21
About 40 EUR
X1
About 50 EUR