Screen size
U121Winner: 1.8"+23%
Watch Ultimate Design Spring1.4"
Quick verdict
Watch Ultimate Design Spring leads the measured specs 9-6.
Measured wins
U121
6
spec wins
Ties
1
equal specs
Watch Ultimate Design Spring
9
spec wins
Overall winner
Screen size
Technology
U121
GSM / UMTS
Watch Ultimate Design Spring
HSPA / LTE
2G bands
U121
GSM 900 / 1800 / 1900
Watch Ultimate Design Spring
N/A
3G bands
U121
UMTS 2100
Watch Ultimate Design Spring
HSDPA 850 / 900 / 1900 / 2100
Speed
U121
Yes, 384 kbps
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
U121
-
Watch Ultimate Design Spring
LTE
Announced
U121
2007, Q2
Watch Ultimate Design Spring
2026, April 20
Status
U121
Discontinued
Watch Ultimate Design Spring
Available. Released 2026, May 08
Dimensions
U121
103 x 45 x 14.5 mm, 66 cc (4.06 x 1.77 x 0.57 in)
Watch Ultimate Design Spring
42.9 x 42.9 x 10.8 mm (1.69 x 1.69 x 0.43 in)
Weight
U121
90 g (3.17 oz)
Watch Ultimate Design Spring
91 g (3.21 oz)
SIM
U121
Mini-SIM
Watch Ultimate Design Spring
eSIM
Build
U121
-
Watch Ultimate Design Spring
Sapphire crystal front, titanium alloy front shell, ceramic back
Other
U121
-
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
U121
TFT, 256K colors
Watch Ultimate Design Spring
LTPO2 AMOLED, 3000 nits (peak)
Size
U121
1.8 inches, 10.2 cm2 (~22.0% screen-to-body ratio)
Watch Ultimate Design Spring
1.38 inches
Resolution
U121
176 x 220 pixels (~157 ppi density)
Watch Ultimate Design Spring
466 x 466 pixels (~338 ppi density)
Protection
U121
-
Watch Ultimate Design Spring
Sapphire crystal glass
Card slot
U121
microSD (dedicated slot)
Watch Ultimate Design Spring
No
Phonebook
U121
1000 entries
Watch Ultimate Design Spring
-
Call records
U121
20 dialed, 20 received, 20 missed calls
Watch Ultimate Design Spring
-
Single
U121
1.3 MP
Watch Ultimate Design Spring
-
Video
U121
Yes
Watch Ultimate Design Spring
-
Single
U121
VGA videocall camera
Watch Ultimate Design Spring
-
Video
U121
Watch Ultimate Design Spring
-
Loudspeaker
U121
Yes
Watch Ultimate Design Spring
Yes
3.5mm jack
U121
Yes
Watch Ultimate Design Spring
No
WLAN
U121
No
Watch Ultimate Design Spring
Wi-Fi 802.11 a/b/g/n/ac/6, dual-band
Bluetooth
U121
1.1
Watch Ultimate Design Spring
5.2, A2DP, LE
Positioning
U121
No
Watch Ultimate Design Spring
GPS (L1+L5), GLONASS, GALILEO (L1+L5), QZSS (L1+L5), BDS
Radio
U121
FM radio
Watch Ultimate Design Spring
No
USB
U121
2.0
Watch Ultimate Design Spring
No
NFC
U121
-
Watch Ultimate Design Spring
Yes
Sensors
U121
Watch Ultimate Design Spring
Accelerometer, gyro, heart rate, barometer, compass, SpO2, thermometer (body temperature), X-TAP
Messaging
U121
SMS, MMS, Email
Watch Ultimate Design Spring
-
Browser
U121
WAP 2.0/xHTML, RSS read
Watch Ultimate Design Spring
-
Games
U121
Yes
Watch Ultimate Design Spring
-
Java
U121
No
Watch Ultimate Design Spring
-
Other
U121
MP3/MP4/AAC/3GP player Predictive text input Organizer Photo editor MS Word viewer Video streaming
Watch Ultimate Design Spring
Sleep apnea detection Heart Rate Variability (HRV) Arterial Stiffness Detection
Type
U121
Removable Li-Ion battery
Watch Ultimate Design Spring
Li-Ion 540 mAh
Stand-by
U121
Up to 300 h
Watch Ultimate Design Spring
-
Charging
U121
-
Watch Ultimate Design Spring
Wireless
Colors
U121
Grey
Watch Ultimate Design Spring
Diamond Silver
Models
U121
-
Watch Ultimate Design Spring
CHC-AL00
Price
U121
-
Watch Ultimate Design Spring
About 4000 EUR
OS
U121
-
Watch Ultimate Design Spring
HarmonyOS 6.1
Chipset
U121
-
Watch Ultimate Design Spring
Kirin W80
Other
U121
-
Watch Ultimate Design Spring
No