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Apple eSIM device guide

Apple Watch Ultra 3eSIM Support and Specs

Apple Watch Ultra 3 supports eSIM. Review Apple 5G compatibility, key device specs, SIM details, battery, display, camera and network bands for encryptSIM. Released 2025, September 19.

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Apple Watch Ultra 3 device
At a glance

Key device specs

eSIM
Ready for instant activation
Network
GSM / HSPA / LTE / 5G
Display
1.98", 514x422 pixels
Chipset
Apple S10
Battery
599 mAh
Storage
64GB storage, no card slot

Does Apple Watch Ultra 3 support eSIM?

Apple Watch Ultra 3 is listed as an eSIM-capable device in the encryptSIM device catalog.

eSIM supported

eSIM facts

  • Active eSIMs: Supported
  • Stored eSIMs: Varies by model
  • SIM variants: eSIM

eSIM

Connectivity profile

  • GSM / HSPA / LTE / 5G
  • SA/NSA
  • Available. Released 2025, September 19

Install flow

  • Confirm device model and regional SIM variant.
  • Buy an encryptSIM plan for the destination.
  • Scan the QR code and activate mobile data.
Device FAQ

Common questions about Apple Watch Ultra 3

Does Apple Watch Ultra 3 support eSIM?

Apple Watch Ultra 3 is listed as an eSIM-capable device in the encryptSIM device catalog. eSIM availability can still vary by region, carrier, firmware, and hardware variant.

Can I use encryptSIM with Apple Watch Ultra 3?

Yes. If your Apple Watch Ultra 3 model is unlocked and supports eSIM in your region, you can install an encryptSIM eSIM data plan on it.

Does Apple Watch Ultra 3 support 5G?

Apple Watch Ultra 3 is listed with 5G support. Actual 5G availability depends on the local network, plan, bands, and coverage.

What SIM setup does Apple Watch Ultra 3 use?

Apple Watch Ultra 3 SIM details: eSIM.

Which operating system does Apple Watch Ultra 3 use?

Apple Watch Ultra 3 is listed with watchOS 26, up to watchOS 26.4. Software updates and regional firmware can affect setup flows and carrier options.

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Technical details

Detailed Apple Watch Ultra 3 specifications

Network Architecture

Technology
GSM / HSPA / LTE / 5G
2g Bands
GSM 850 / 900 / 1800 / 1900
3g Bands
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 - International, China, HK
Other
HSDPA 850 / 1700(AWS) / 1900 / 2100 - USA, LATAM, Canada
4g Bands
1, 2, 3, 4, 5, 6, 7, 8, 18, 19, 20, 25, 26, 28, 39, 40, 41, 66 - International, China, HK
Other 2
1, 2, 3, 4, 5, 6, 7, 12, 13, 14, 17, 18, 19, 25, 26, 39, 40, 41, 66 - USA, LATAM, Canada
5g Bands
SA/NSA
Speed
HSPA, LTE, 5G

Launch & Availability

Announced
2025, September 09
Status
Available. Released 2025, September 19

Physical Attributes

Dimensions
49 x 44 x 12 mm (1.93 x 1.73 x 0.47 in)
Weight
61.6 g or 61.8 g (black) (2.15 oz)
Build
Sapphire crystal front, ceramic/sapphire crystal back, titanium frame (grade 5)
Sim
eSIM
Other
IP6X certified 100m water resistant (22810:2010) 40m swimproof/diving (EN13319) MIL-STD-810H compliant ECG certified (region dependent SW application; HW available on all models)

Display Performance

Type
Retina LTPO3 OLED, 3000 nits (peak)
Size
1.98 inches
Resolution
514 x 422 pixels (~326 ppi density)
Protection
Sapphire crystal glass
Other
Wide-angle OLED

Platform

Os
watchOS 26, upgradable to watchOS 26.4
Chipset
Apple S10
Cpu
Dual-core
Gpu
PowerVR

Memory

Card Slot
No
Internal
64GB

Camera

Other
No

Sound

Loudspeaker
Yes, with dual speakers (86-decibel)
3 5mm Jack
No

Connectivity

Wlan
Wi-Fi 802.11 b/g/n, dual-band
Bluetooth
5.3, A2DP, LE
Positioning
GPS (L1+L5), GLONASS, GALILEO, BDS, QZSS
Nfc
Yes
Radio
No
Usb
No

Features

Sensors
Accelerometer, gyro, heart rate, barometer, always-on altimeter (-500m to 9000m), compass, SpO2, VO2max, temperature (body), temperature (water)
Other
Temperature sensing (0.01˚ accuracy) Depth gauge (±1m accuracy) Ultra Wideband (UWB) support (gen2 chip) Emergency SOS via satellite

Battery

Type
Li-Ion 599 mAh
Charging
Wireless, 0-80% in 45 min

Misc

Colors
Natural, Black
Models
A3281, A3282
Sar
1.16 W/kg (head)
Sar Eu
1.19 W/kg (head)
Price
€ 799.00