Screen size
C91.3"
U1Winner: 1.9"+34%
Quick verdict
U1 leads the measured specs 5-3.
Measured wins
C9
3
spec wins
Ties
4
equal specs
U1
5
spec wins
Overall winner
Screen size
Technology
C9
No cellular connectivity
U1
No cellular connectivity
2G bands
C9
N/A
U1
N/A
3G bands
C9
N/A
U1
N/A
4G bands
C9
N/A
U1
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
C9
No
U1
No
GPRS
C9
No
U1
No
EDGE
C9
No
U1
No
Announced
C9
2021
U1
2025, February
Status
C9
Available. Released 2021
U1
Available. Released 2025, February
Dimensions
C9
43 x 43 x 10 mm (1.69 x 1.69 x 0.39 in)
U1
49.8 x 42.4 x 11.4 mm (1.96 x 1.67 x 0.45 in)
Weight
C9
-
U1
43.8 g (1.55 oz)
SIM
C9
No
U1
No
Other
C9
IP68 dust tight and water resistant (immersible up to 1.5m for 30 min)
U1
Waterproof (1ATM)
Type
C9
IPS LCD
U1
TFT LCD
Size
C9
1.28 inches
U1
1.93 inches
Resolution
C9
240 x 240 pixels (~265 ppi density)
U1
240 x 288 pixels (~194 ppi density)
Protection
C9
Scratch-resistant glass
U1
-
OS
C9
Proprietary OS
U1
Proprietary OS
Card slot
C9
No
U1
No
Internal
C9
16MB
U1
16MB
Other
C9
No
U1
No
Loudspeaker
C9
No
U1
Yes
3.5mm jack
C9
No
U1
No
WLAN
C9
No
U1
No
Bluetooth
C9
5.0, A2DP, LE
U1
5.4, A2DP, LE
Positioning
C9
No
U1
No
NFC
C9
No
U1
No
Radio
C9
No
U1
No
USB
C9
No
U1
No
Sensors
C9
Accelerometer, gyro, heart rate
U1
Accelerometer, gyro, heart rate, SpO2
Type
C9
210 mAh
U1
300 mAh
Colors
C9
Black, Blue, Pink
U1
Black, Pink