Screen size
C211.3"
GT3Winner: 2.0"+33%
Quick verdict
GT3 leads the measured specs 5-3.
Measured wins
C21
3
spec wins
Ties
4
equal specs
GT3
5
spec wins
Overall winner
Screen size
Technology
C21
No cellular connectivity
GT3
No cellular connectivity
2G bands
C21
N/A
GT3
N/A
3G bands
C21
N/A
GT3
N/A
4G bands
C21
N/A
GT3
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
N/A
Speed
C21
No
GT3
No
GPRS
C21
No
GT3
No
EDGE
C21
No
GT3
No
Announced
C21
2023, November
GT3
2025, March
Status
C21
Available. Released 2023, November
GT3
Available. Released 2025, March
Dimensions
C21
46.5 x 46.5 x 13 mm (1.83 x 1.83 x 0.51 in)
GT3
59.3 x 48.2 x 13.4 mm (2.33 x 1.90 x 0.53 in)
Weight
C21
-
GT3
57 g (2.01 oz)
Build
C21
Zinc alloy frame
GT3
-
SIM
C21
No
GT3
No
Other
C21
IP68 dust tight and water resistant (immersible up to 1.5m for 30 min)
GT3
Waterproof (5ATM)
Type
C21
TFT LCD
GT3
AMOLED
Size
C21
1.32 inches
GT3
1.96 inches
Resolution
C21
360 x 360 pixels (~386 ppi density)
GT3
410 x 502 pixels (~331 ppi density)
Protection
C21
Corning Gorilla Glass
GT3
-
OS
C21
Proprietary OS
GT3
Proprietary OS
Card slot
C21
No
GT3
No
Internal
C21
128MB
GT3
32MB
Other
C21
No
GT3
No
Loudspeaker
C21
No
GT3
Yes
3.5mm jack
C21
No
GT3
No
WLAN
C21
No
GT3
No
Bluetooth
C21
5.0, A2DP
GT3
5.3, A2DP, LE
Positioning
C21
No
GT3
GPS (L1+L5)
NFC
C21
No
GT3
No
Radio
C21
No
GT3
No
USB
C21
No
GT3
No
Sensors
C21
Accelerometer, heart rate, SpO2, blood pressure
GT3
Accelerometer, gyro, barometer, compass, heart rate, SpO2
Languages
C21
-
GT3
Type
C21
300 mAh
GT3
530 mAh
Colors
C21
Black, Silver
GT3
Black, Gray
Price
C21
About 40 EUR
GT3
-