Screen size
C51.7"
U1Winner: 1.9"+12%
Quick verdict
U1 leads the measured specs 5-3.
Measured wins
C5
3
spec wins
Ties
4
equal specs
U1
5
spec wins
Overall winner
Screen size
Technology
C5
No cellular connectivity
U1
No cellular connectivity
2G bands
C5
N/A
U1
N/A
3G bands
C5
N/A
U1
N/A
4G bands
C5
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
C5
No
U1
No
GPRS
C5
No
U1
No
EDGE
C5
No
U1
No
Announced
C5
2020. Released 2020
U1
2025, February
Status
C5
Discontinued
U1
Available. Released 2025, February
Dimensions
C5
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
C5
-
U1
43.8 g (1.55 oz)
SIM
C5
No
U1
No
Other
C5
IP68 dust tight and water resistant (immersible up to 1.5m for 30 min) Waterproof (5ATM)
U1
Waterproof (1ATM)
Type
C5
TFT LCD
U1
TFT LCD
Size
C5
1.7 inches
U1
1.93 inches
Resolution
C5
240 x 280 pixels (~217 ppi density)
U1
240 x 288 pixels (~194 ppi density)
Protection
C5
Scratch-resistant glass
U1
-
OS
C5
Proprietary OS
U1
Proprietary OS
Card slot
C5
No
U1
No
Internal
C5
16MB
U1
16MB
Other
C5
No
U1
No
Loudspeaker
C5
No
U1
Yes
3.5mm jack
C5
No
U1
No
WLAN
C5
No
U1
No
Bluetooth
C5
5.1, A2DP, LE
U1
5.4, A2DP, LE
Positioning
C5
No
U1
No
NFC
C5
No
U1
No
Radio
C5
No
U1
No
USB
C5
No
U1
No
Sensors
C5
Accelerometer, gyro, heart rate
U1
Accelerometer, gyro, heart rate, SpO2
Type
C5
260 mAh
U1
300 mAh
Colors
C5
Black, Pink
U1
Black, Pink