Screen size
C71.5"
U1Winner: 1.9"+20%
Quick verdict
U1 leads the measured specs 5-3.
Measured wins
C7
3
spec wins
Ties
4
equal specs
U1
5
spec wins
Overall winner
Screen size
Technology
C7
No cellular connectivity
U1
No cellular connectivity
2G bands
C7
N/A
U1
N/A
3G bands
C7
N/A
U1
N/A
4G bands
C7
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
C7
No
U1
No
GPRS
C7
No
U1
No
EDGE
C7
No
U1
No
Announced
C7
2021
U1
2025, February
Status
C7
Available. Released 2021
U1
Available. Released 2025, February
Dimensions
C7
44 x 44 x 12 mm (1.73 x 1.73 x 0.47 in)
U1
49.8 x 42.4 x 11.4 mm (1.96 x 1.67 x 0.45 in)
Weight
C7
34 g (1.20 oz)
U1
43.8 g (1.55 oz)
SIM
C7
No
U1
No
Other
C7
IP68 dust tight and water resistant (immersible up to 1.5m for 30 min)
U1
Waterproof (1ATM)
Type
C7
IPS LCD
U1
TFT LCD
Size
C7
1.54 inches
U1
1.93 inches
Resolution
C7
240 x 240 pixels (~220 ppi density)
U1
240 x 288 pixels (~194 ppi density)
Protection
C7
Scratch-resistant glass
U1
-
OS
C7
Proprietary OS
U1
Proprietary OS
Card slot
C7
No
U1
No
Internal
C7
-
U1
16MB
Other
C7
No
U1
No
Loudspeaker
C7
No
U1
Yes
3.5mm jack
C7
No
U1
No
WLAN
C7
No
U1
No
Bluetooth
C7
5.0, A2DP, LE
U1
5.4, A2DP, LE
Positioning
C7
No
U1
No
NFC
C7
No
U1
No
Radio
C7
No
U1
No
USB
C7
No
U1
No
Sensors
C7
Accelerometer, gyro, heart rate
U1
Accelerometer, gyro, heart rate, SpO2
Type
C7
260 mAh
U1
300 mAh
Colors
C7
Black, Pink
U1
Black, Pink