Samsung Galaxy Watch 4

The device largely followed the design language of the preceding Galaxy Watch Active 2 and Galaxy Watch 3, but including all new software. The watch also included EKG, body compositional analysis, and blood pressure monitoring via the Samsung BioActive sensor. The Galaxy Watch 4 was succeeded by the Galaxy Watch 5 on August 10, 2022, and had the FE-based model on June 13, 2024.

• Name — Samsung Galaxy Watch 4 • Codename — Fresh • Brand — Samsung • Manufacturer — Samsung Electronics • Series — Galaxy Watch • Family — Samsung Galaxy • Model Number — SM-R860, SM-R870, SM-R880, SM-R890 (Wi-Fi only), SM-R865U, SM-R875U, SM-R885U, SM-R895U (USA, LTE model) • Predecessor — Samsung Galaxy Watch Active 2 Samsung Galaxy Watch 3 • Successor — Samsung Galaxy Watch 5 • Related — Samsung Galaxy Watch FE • Type — Smartwatch • Memory — 1.5 GB LPDDR4X RAM • Storage — 16 GB eMMC 5.1 • Battery — Non-removable Li-Ion 247mAh (40 mm) 361mAh (44 mm) • Charging — Wireless up to 10W • Soc — Exynos W920 (5 nm) System-in-Package • Cpu — Dual-core 1.18GHz Cortex-A55 • Gpu — 667MHz Mali-G68 MP2 • Os — Original: Wear OS 3.0 with One UI Watch 3.0 Current: Wear OS 6.0 with One UI Watch 8.0 • External Display — Always On Display • Display — 1.19 in RGB stripe Super AMOLED capacitive display, 396×396 pixels, 16 M colours, ~330 ppi, 1:1 aspect ratio

• Model — Galaxy Watch 4 — Galaxy Watch 4 Classic • Size — 40 mm — 44 mm — 42 mm — 46 mm • Part no. — SM-R860 (Wi-Fi) SM-R865 (LTE) — SM-R870 (Wi-Fi) SM-R875 (LTE) — SM-R880 (Wi-Fi) SM-R885 (LTE) — SM-R890 (Wi-Fi) SM-R895 (LTE) • Colors — Black, green, pink gold, silver — Black, green, silver — Black, silver • Display — 1.2" (30.4 mm) — 1.4" (35.6 mm) — 1.2" (30.4 mm) — 1.4" (35.6 mm) • Resolution — 396 x 396 pixels — 450 x 450 pixels — 396 x 396 pixels — 450 x 450 pixels • Glass — Corning Gorilla Glass DX+ — Corning Gorilla Glass DX • Chassis — Aluminum — Stainless steel • Processor — Exynos W920 dual-core 1.18 GHz Cortex-A55 • Operating system — Wear OS 3.0 (upgradable to 6.0) • UI — One UI Watch 3.0 (upgradable to 8.0) • Size (excluding health sensor) — 40.4 x 39.3 x 9.8 mm (1.59 x 1.55 x 0.39 in) — 44.4 x 43.3 x 9.8 mm (1.75 x 1.70 x 0.39 in) — 41.5 x 41.5 x 11.2 mm (1.63 x 1.63 x 0.44 in) — 45.5 x 45.5 x 11 mm (1.79 x 1.79 x 0.43 in) • Weight (without strap) — 25.9 g (0.92 oz) — 30.3 g (1.06 oz) — 46.5 g (1.62 oz) — 52 g (1.83 oz) • Strap size — 20 mm • Water resistance — 5ATM + IP68 / MIL-STD-810G • Memory — 1.5 GB RAM + 16 GB flash memory • Connectivity — 4G/LTE with eSIM (LTE models only) Bluetooth 5.0 Wi-Fi a/b/g/n 2.4+5 GHz NFC A-GPS, GLONASS, Beidou, Galileo • Sensors — Heart rate monitor Blood oxygen monitor Electrocardiography (ECG) Blood pressure monitor Bioelectrical impedance analysis Accelerometer Barometer Gyro sensor Geomagnetic sensor Light sensor • Battery — 247 mAh — 361 mAh — 247 mAh — 361 mAh

The smartwatch was the first watch released by Samsung to use Wear OS instead of Samsung's own Tizen OS. This smartwatch is region locked in mainland China, unlike past models.

Unlike past Wear OS devices, Wear OS 3 supports a wider variety of languages that the end user can choose from. An ADB command can be used to temporarily change the watch's language to another one, which will reset when the device is reconnected to the phone. Depending on the region where the device was sold from (thus depending on the CSC code), the language and region options may differ.