Screen size
U1310Winner: 2.2"+17%
Watch Fit 41.8"
Quick verdict
Watch Fit 4 leads the measured specs 9-5.
Measured wins
U1310
5
spec wins
Ties
1
equal specs
Watch Fit 4
9
spec wins
Overall winner
Screen size
Technology
U1310
GSM / UMTS
Watch Fit 4
No cellular connectivity
2G bands
U1310
GSM 900 / 1800 / 1900
Watch Fit 4
N/A
3G bands
U1310
UMTS 2100
Watch Fit 4
N/A
Speed
U1310
Yes, 384 kbps
Watch Fit 4
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
3.5mm jack
SD card
Stereo speakers
No
4G bands
U1310
-
Watch Fit 4
N/A
GPRS
U1310
-
Watch Fit 4
No
EDGE
U1310
-
Watch Fit 4
No
Announced
U1310
2008, Q2
Watch Fit 4
2025, May 15
Status
U1310
Discontinued
Watch Fit 4
Available. Released 2025, May 26
Dimensions
U1310
108 x 47.5 x 14.5 mm, 70 cc (4.25 x 1.87 x 0.57 in)
Watch Fit 4
43 x 38 x 9.5 mm (1.69 x 1.50 x 0.37 in)
Weight
U1310
Watch Fit 4
27 g (0.95 oz)
SIM
U1310
Mini-SIM
Watch Fit 4
No
Build
U1310
-
Watch Fit 4
Glass front, aluminum alloy frame, plastic back
Other
U1310
-
Watch Fit 4
5 ATM water resistant
Type
U1310
TFT, 65K colors
Watch Fit 4
AMOLED, 2000 nits (peak)
Size
U1310
2.2 inches, 15.0 cm2 (~29.2% screen-to-body ratio)
Watch Fit 4
1.82 inches
Resolution
U1310
240 x 320 pixels, 4:3 ratio (~182 ppi density)
Watch Fit 4
480 x 408 pixels (~347 ppi density)
Card slot
U1310
microSD (dedicated slot)
Watch Fit 4
No
Phonebook
U1310
1000 entries
Watch Fit 4
No
Call records
U1310
20 dialed, 20 received, 20 missed calls
Watch Fit 4
No
Internal
U1310
-
Watch Fit 4
Unspecified
Single
U1310
2 MP
Watch Fit 4
-
Video
U1310
Yes
Watch Fit 4
-
Single
U1310
VGA videocall camera
Watch Fit 4
-
Video
U1310
Watch Fit 4
-
Loudspeaker
U1310
Yes
Watch Fit 4
Yes
3.5mm jack
U1310
Yes
Watch Fit 4
No
WLAN
U1310
No
Watch Fit 4
No
Bluetooth
U1310
1.2, A2DP
Watch Fit 4
5.2, LE
Positioning
U1310
No
Watch Fit 4
GPS (L1+L5), GALILEO (E1+E5a), QZSS (L1+L5), BDS (B1l+B1C), GLONASS
Radio
U1310
No
Watch Fit 4
No
USB
U1310
2.0
Watch Fit 4
No
NFC
U1310
-
Watch Fit 4
Yes (gray model only)
Sensors
U1310
Watch Fit 4
Accelerometer, gyro, heart rate, SpO2, compass, barometer
Messaging
U1310
SMS, MMS, Email
Watch Fit 4
Email, IM
Browser
U1310
WAP 2.0/xHTML, RSS read
Watch Fit 4
-
Games
U1310
Yes
Watch Fit 4
No
Java
U1310
No
Watch Fit 4
No
Other
U1310
MP3/MP4/AAC player Predictive text input Organizer Photo editor Video streaming
Watch Fit 4
Pulse wave arrhythmia analysis
Type
U1310
Removable Li-Ion battery
Watch Fit 4
Li-Ion 400 mAh
Charging
U1310
-
Watch Fit 4
5W wireless
Colors
U1310
Black
Watch Fit 4
Black, Silver
Models
U1310
-
Watch Fit 4
SYA-B19
Price
U1310
-
Watch Fit 4
$ 121.00 / € 104.76
Other
U1310
-
Watch Fit 4
No