Screen size
C71.5"
X3Winner: 1.7"+11%
Quick verdict
X3 leads the measured specs 5-3.
Measured wins
C7
3
spec wins
Ties
4
equal specs
X3
5
spec wins
Overall winner
Screen size
Technology
C7
No cellular connectivity
X3
No cellular connectivity
2G bands
C7
N/A
X3
N/A
3G bands
C7
N/A
X3
N/A
4G bands
C7
N/A
X3
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
C7
No
X3
No
GPRS
C7
No
X3
No
EDGE
C7
No
X3
No
Announced
C7
2021
X3
2025, March
Status
C7
Available. Released 2021
X3
Available. Released 2025, March
Dimensions
C7
44 x 44 x 12 mm (1.73 x 1.73 x 0.47 in)
X3
53.8 x 53.8 x 13.5 mm (2.12 x 2.12 x 0.53 in)
Weight
C7
34 g (1.20 oz)
X3
94.6 g (3.35 oz)
SIM
C7
No
X3
No
Other
C7
IP68 dust tight and water resistant (immersible up to 1.5m for 30 min)
X3
Waterproof (5ATM)
Build
C7
-
X3
Zinc alloy frame and rear
Type
C7
IPS LCD
X3
TFT LCD
Size
C7
1.54 inches
X3
1.73 inches
Resolution
C7
240 x 240 pixels (~220 ppi density)
X3
466 x 466 pixels (~381 ppi density)
Protection
C7
Scratch-resistant glass
X3
-
OS
C7
Proprietary OS
X3
Proprietary OS
Card slot
C7
No
X3
No
Internal
C7
-
X3
16MB
Other
C7
No
X3
No
Loudspeaker
C7
No
X3
Yes
3.5mm jack
C7
No
X3
No
WLAN
C7
No
X3
No
Bluetooth
C7
5.0, A2DP, LE
X3
5.3, A2DP
Positioning
C7
No
X3
Unspecified
NFC
C7
No
X3
No
Radio
C7
No
X3
No
USB
C7
No
X3
No
Sensors
C7
Accelerometer, gyro, heart rate
X3
Accelerometer, heart rate, SpO2, barometer, compass
Type
C7
260 mAh
X3
900 mAh
Colors
C7
Black, Pink
X3
Black