Screen size
U8100Winner: 2.8"+51%
Watch Ultimate Design Spring1.4"
Quick verdict
Watch Ultimate Design Spring leads the measured specs 9-6.
Measured wins
U8100
6
spec wins
Ties
1
equal specs
Watch Ultimate Design Spring
9
spec wins
Overall winner
Screen size
Technology
U8100
GSM / HSPA
Watch Ultimate Design Spring
HSPA / LTE
2G bands
U8100
GSM 900 / 1800 / 1900
Watch Ultimate Design Spring
N/A
3G bands
U8100
HSDPA 900 / 2100
Watch Ultimate Design Spring
HSDPA 850 / 900 / 1900 / 2100
Speed
U8100
HSPA 7.2/0.384 Mbps
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
Watch Ultimate Design Spring
HSPA, LTE
4G bands
U8100
-
Watch Ultimate Design Spring
LTE
Announced
U8100
2010, February. Released 2010, July
Watch Ultimate Design Spring
2026, April 20
Status
U8100
Discontinued
Watch Ultimate Design Spring
Available. Released 2026, May 08
Dimensions
U8100
107.5 x 57 x 13.8 mm (4.23 x 2.24 x 0.54 in)
Watch Ultimate Design Spring
42.9 x 42.9 x 10.8 mm (1.69 x 1.69 x 0.43 in)
Weight
U8100
104 g (3.67 oz)
Watch Ultimate Design Spring
91 g (3.21 oz)
SIM
U8100
Mini-SIM
Watch Ultimate Design Spring
eSIM
Build
U8100
-
Watch Ultimate Design Spring
Sapphire crystal front, titanium alloy front shell, ceramic back
Other
U8100
-
Watch Ultimate Design Spring
99 natural diamonds (0.8 carats) 5 ATM (maximum depth 40 meters when diving) IP68/IP69 dust tight and water resistant (high pressure water jets; immersible up to 1.5m for 30 min) ECG certified
Type
U8100
TFT, 256K colors
Watch Ultimate Design Spring
LTPO2 AMOLED, 3000 nits (peak)
Size
U8100
2.8 inches, 24.3 cm2 (~39.6% screen-to-body ratio)
Watch Ultimate Design Spring
1.38 inches
Resolution
U8100
240 x 320 pixels, 4:3 ratio (~143 ppi density)
Watch Ultimate Design Spring
466 x 466 pixels (~338 ppi density)
Other
U8100
Watch Ultimate Design Spring
-
Protection
U8100
-
Watch Ultimate Design Spring
Sapphire crystal glass
OS
U8100
Android 2.1 (Eclair)
Watch Ultimate Design Spring
HarmonyOS 6.1
Chipset
U8100
-
Watch Ultimate Design Spring
Kirin W80
Card slot
U8100
microSDHC (dedicated slot)
Watch Ultimate Design Spring
No
Single
U8100
3.15 MP
Watch Ultimate Design Spring
-
Features
U8100
LED flash
Watch Ultimate Design Spring
-
Video
U8100
Yes
Watch Ultimate Design Spring
-
Single
U8100
VGA
Watch Ultimate Design Spring
-
Video
U8100
Watch Ultimate Design Spring
-
Loudspeaker
U8100
Yes
Watch Ultimate Design Spring
Yes
3.5mm jack
U8100
Yes
Watch Ultimate Design Spring
No
WLAN
U8100
Wi-Fi 802.11 b/g
Watch Ultimate Design Spring
Wi-Fi 802.11 a/b/g/n/ac/6, dual-band
Bluetooth
U8100
2.0, A2DP
Watch Ultimate Design Spring
5.2, A2DP, LE
Positioning
U8100
GPS, A-GPS
Watch Ultimate Design Spring
GPS (L1+L5), GLONASS, GALILEO (L1+L5), QZSS (L1+L5), BDS
Radio
U8100
FM radio
Watch Ultimate Design Spring
No
USB
U8100
microUSB 2.0
Watch Ultimate Design Spring
No
NFC
U8100
-
Watch Ultimate Design Spring
Yes
Sensors
U8100
Accelerometer
Watch Ultimate Design Spring
Accelerometer, gyro, heart rate, barometer, compass, SpO2, thermometer (body temperature), X-TAP
Browser
U8100
HTML
Watch Ultimate Design Spring
-
Other
U8100
MP3/WAV/WMA/eAAC+ player MP4/WMV/H.264 player Document viewer Voice memo Predictive text input
Watch Ultimate Design Spring
Sleep apnea detection Heart Rate Variability (HRV) Arterial Stiffness Detection
Type
U8100
Removable Li-Ion 1150 mAh battery
Watch Ultimate Design Spring
Li-Ion 540 mAh
Stand-by
U8100
Up to 240 h
Watch Ultimate Design Spring
-
Talk time
U8100
Up to 4 h 30 min
Watch Ultimate Design Spring
-
Charging
U8100
-
Watch Ultimate Design Spring
Wireless
Colors
U8100
Pink
Watch Ultimate Design Spring
Diamond Silver
SAR
U8100
0.76 W/kg (head) 0.86 W/kg (body)
Watch Ultimate Design Spring
-
SAR EU
U8100
0.68 W/kg (head)
Watch Ultimate Design Spring
-
Price
U8100
About 70 EUR
Watch Ultimate Design Spring
About 4000 EUR
Models
U8100
-
Watch Ultimate Design Spring
CHC-AL00
Other
U8100
-
Watch Ultimate Design Spring
No