OnePlus
£269.00
one-off
OnePlus Watch 3 SIM Free deals
Find the best SIM Free deal on the OnePlus Watch 3 from 4 options.
Deals
SIM Free from £249.00
Color
All
Black
Silver
Storage
All
32GB
Android users who want a rugged, feature-complete Wear OS smartwatch with serious health tracking and multi-day battery life, and who are comfortable with a large 46.6mm case.
Best sim free deal for this OnePlus Watch 3 SIM Free
OnePlus
OnePlus Watch 3 SIM Free (4 deals)
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Watch 3 32GB (Black)
Cost breakdown
Cashback:
£0.00
Upfront Cost:
£249.00
Watch 3 32GB (Silver)
Cost breakdown
Cashback:
£0.00
Upfront Cost:
£249.00
Watch 3 32GB (Black)
Cost breakdown
Cashback:
£0.00
Upfront Cost:
£269.00
Watch 3 32GB (Black)
Cost breakdown
Cashback:
£0.00
Upfront Cost:
£269.00
OnePlus Watch 3 Deals - July 2026
Compare 4 SIM-free offers for the OnePlus Watch 3 from UK retailers.
Buy the OnePlus Watch 3 SIM-free from £249.00 at OnePlus.
About the OnePlus Watch 3
The OnePlus Watch 3 is one of the few Wear OS watches that does not ask you to charge it every other night. OnePlus quotes up to five days in smart mode, three under heavy use and up to 16 days with the power saver mode, which it achieves by running a dual-engine setup: Wear OS by Google for apps and a low-power RTOS handling the basics. The result is a watch with Google Wallet, Google Maps and Play Store apps that still behaves like a fitness tracker on battery. The build backs that up, with a stainless steel case, a titanium bezel and a sapphire crystal cover over a 1.5-inch LTPO AMOLED screen that peaks at 2,200 nits, so it stays readable in summer sun. Health tracking is unusually thorough for the price, covering ECG, wrist temperature, blood oxygen and a 60-second check-in that samples several metrics at once. It is a large watch at 46.6mm and 81g with the strap, so smaller wrists should try before buying, and it runs Wear OS, which means it is designed to pair with Android phones.
Expert Rating
4.4
(4 reviews)
Frequently asked questions
Is the OnePlus Watch 3 worth buying?
Yes, if you use an Android phone and want Wear OS apps without daily charging. Up to five days of battery in smart mode, a sapphire crystal and titanium bezel build, and ECG plus wrist temperature sensing make it strong value against other Wear OS watches. It is a large watch, though, so it suits bigger wrists better.
How long does the OnePlus Watch 3 battery last?
OnePlus rates it at up to five days in smart mode, around three days with heavy use, and up to 16 days in power saver mode. That is well beyond most Wear OS watches, and it comes from pairing the Snapdragon W5 chip with a separate low-power BES2800BP co-processor that handles routine tasks.
Does the OnePlus Watch 3 work with an iPhone?
The OnePlus Watch 3 runs Wear OS by Google alongside a real-time OS, and OnePlus positions it as an Android companion, so iPhone users should look at an Apple Watch or a Garmin instead. If you are on Android, you get the full Play Store, Google Wallet contactless payments and Google Maps on the wrist.
What health features does the OnePlus Watch 3 have?
It covers ECG, wrist temperature, optical heart rate with high and low alerts, blood oxygen spot checks and all-day tracking, sleep monitoring with a snoring risk assessment, and a vascular health test for arterial stiffness. The 60-second Health Check-In gathers several of these readings in one measurement, and data syncs through the OHealth app with Google Health Connect and Strava support.
Is the OnePlus Watch 3 waterproof and durable?
It holds a 5ATM water rating and IP68 dust and water resistance, and OnePlus says it passed MIL-STD-810H testing covering salt spray, sand, vibration and temperature extremes. The screen is protected by sapphire crystal, which resists scratches better than the toughened glass used on most smartwatches.
Is the OnePlus Watch 3 good for running and swimming?
Yes. It offers more than 100 sports modes, with 11 professional modes that add detailed metrics such as running cadence, ground contact time and left-right balance, or swim pace, lap count and SWOLF. Dual-frequency L1 and L5 satellite positioning improves accuracy on routes hemmed in by buildings or trees.
OnePlus Watch 3 Specifications
General
Camera
Primary Camera
No
Second Camera
No
Third Camera
No
Display
Type
LTPO AMOLED, 2200 nits (peak)
Display Size
1.5
Display Resolution
466 x 466 pixels (~310 ppi density)
Display Protection
Sapphire crystal glass
CPU & Memory
Sound
Loudspeaker
Yes
3.5mm Jack
No
Connectivity & Data
2G
N/A
3G
N/A
4G
N/A
Network Speed
No
Network Technology
No cellular connectivity
Wi-Fi
Wi-Fi 802.11 a/b/g/n, dual-band
Bluetooth
5.2, A2DP, LE
USB
No
NFC
Yes
GPS
GPS (L1+L5), GLONASS, GALILEO, BDS, QZSS
Battery
Battery
648
Charging
7.5W wired
Other
Sensors
Accelerometer, gyro, barometer, compass, heart rate, SpO2, thermometer (skin temperature)