Screen size
U5900sWinner: 2.4"+24%
Watch Fit 41.8"
Quick verdict
Watch Fit 4 leads the measured specs 8-6.
Measured wins
U5900s
6
spec wins
Ties
1
equal specs
Watch Fit 4
8
spec wins
Overall winner
Screen size
Technology
U5900s
GSM / HSPA
Watch Fit 4
No cellular connectivity
2G bands
U5900s
GSM 850 / 900 / 1800 / 1900
Watch Fit 4
N/A
3G bands
U5900s
HSDPA 2100
Watch Fit 4
N/A
Speed
U5900s
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
U5900s
-
Watch Fit 4
N/A
GPRS
U5900s
-
Watch Fit 4
No
EDGE
U5900s
-
Watch Fit 4
No
Announced
U5900s
2011, Q1. Released 2011, May
Watch Fit 4
2025, May 15
Status
U5900s
Discontinued
Watch Fit 4
Available. Released 2025, May 26
Dimensions
U5900s
104.5 x 51.2 x 11.8 mm (4.11 x 2.02 x 0.46 in)
Watch Fit 4
43 x 38 x 9.5 mm (1.69 x 1.50 x 0.37 in)
Weight
U5900s
112 g (3.95 oz)
Watch Fit 4
27 g (0.95 oz)
SIM
U5900s
Mini-SIM
Watch Fit 4
No
Build
U5900s
-
Watch Fit 4
Glass front, aluminum alloy frame, plastic back
Other
U5900s
-
Watch Fit 4
5 ATM water resistant
Type
U5900s
TFT, 256K colors
Watch Fit 4
AMOLED, 2000 nits (peak)
Size
U5900s
2.4 inches, 17.8 cm2 (~33.3% screen-to-body ratio)
Watch Fit 4
1.82 inches
Resolution
U5900s
240 x 320 pixels, 4:3 ratio (~167 ppi density)
Watch Fit 4
480 x 408 pixels (~347 ppi density)
Card slot
U5900s
microSDHC (dedicated slot)
Watch Fit 4
No
Phonebook
U5900s
Yes, Photocall
Watch Fit 4
No
Call records
U5900s
Yes
Watch Fit 4
No
Internal
U5900s
10MB
Watch Fit 4
Unspecified
Single
U5900s
2 MP
Watch Fit 4
-
Video
U5900s
Yes
Watch Fit 4
-
Single
U5900s
VGA videocall camera
Watch Fit 4
-
Video
U5900s
Watch Fit 4
-
Loudspeaker
U5900s
Yes
Watch Fit 4
Yes
3.5mm jack
U5900s
Yes
Watch Fit 4
No
WLAN
U5900s
No
Watch Fit 4
No
Bluetooth
U5900s
2.0, A2DP
Watch Fit 4
5.2, LE
Positioning
U5900s
No
Watch Fit 4
GPS (L1+L5), GALILEO (E1+E5a), QZSS (L1+L5), BDS (B1l+B1C), GLONASS
Radio
U5900s
FM radio
Watch Fit 4
No
USB
U5900s
miniUSB 2.0
Watch Fit 4
No
NFC
U5900s
-
Watch Fit 4
Yes (gray model only)
Sensors
U5900s
Watch Fit 4
Accelerometer, gyro, heart rate, SpO2, compass, barometer
Messaging
U5900s
SMS, MMS, Email
Watch Fit 4
Email, IM
Browser
U5900s
WAP 2.0/xHTML, HTML
Watch Fit 4
-
Games
U5900s
Yes
Watch Fit 4
No
Java
U5900s
Yes
Watch Fit 4
No
Other
U5900s
SNS integration MP3/MP4 player Organizer Predictive text input
Watch Fit 4
Pulse wave arrhythmia analysis
Type
U5900s
Removable Li-Ion 830 mAh battery
Watch Fit 4
Li-Ion 400 mAh
Stand-by
U5900s
Up to 200 h
Watch Fit 4
-
Talk time
U5900s
Up to 4 h
Watch Fit 4
-
Charging
U5900s
-
Watch Fit 4
5W wireless
Colors
U5900s
Black
Watch Fit 4
Black, Silver
Price
U5900s
About 80 EUR
Watch Fit 4
$ 121.00 / € 104.76
Models
U5900s
-
Watch Fit 4
SYA-B19
Other
U5900s
-
Watch Fit 4
No