Apple Watch S4 GPS + LTE Cellular Unlocked Certified Pre-Owned SmartWatch

The Apple Watch Series 4 has been "redesigned and reengineered" with a focus on the features that people use the most: health and wellness. One of the first things I noticed on the Series 4 is the thickness of the Apple Watch. It is now 10.7 mm, compared to 11.4...
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Apple

SmartWatches

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The Apple Watch Series 4 has been "redesigned and reengineered" with a focus on the features that people use the most: health and wellness.

One of the first things I noticed on the Series 4 is the thickness of the Apple Watch. It is now 10.7 mm, compared to 11.4 mm on the Series 3. That's not much, but enough to notice when you mount it on your wrist. It also has a different optical heart rate sensor configuration with a ceramic ring on the back that is designed to help with the ECG app functionality coming later this year.

The digital crown has been modified to now include haptic feedback. The digital crown is also used to help complete a circuit in your body for the ECG measurement. Because the ECG functionality will be coming later, it was not tested in this review.

The accelerometer has been improved to measure twice the level of gravitational forces and is part of the new fall detection and notification system.

I purchased the 44mm model which has a 368x448 pixels display and 977 square mm of display area. This is 230 square mm more of display area compared to the 42mm Series 3.

The general squircle form factor, watch band system, and button layout is the same as before. Thankfully, even though the larger model is now 44mm, the watch bands for the 42mm Series 3 are still compatible with this slightly larger Series 4.

 

Specifications Serie 4 40mm

 

NETWORK

Technology

GSM / HSPA / LTE

2G bands

GSM 850 / 900 / 1800 / 1900

3G bands

HSDPA

4G bands

LTE

Speed

HSPA, LTE

LAUNCH

Announced

2018, September

Status

Available. Released 2018, September

BODY

Dimensions

40 x 34 x 10.7 mm (1.57 x 1.34 x 0.42 in)

Weight

40 g (1.41 oz)

Build

Glass front (Sapphire crystal), ceramic/sapphire crystal back, stainless steel frame

SIM

eSIM

 

50m water resistant
ECG certified (region dependent SW application; HW available on all models)

DISPLAY

Type

LTPO OLED capacitive touchscreen, 16M colors

Size

1.57 inches, 7.8 cm2 (~57.0% screen-to-body ratio)

Resolution

394 x 324 pixels (~326 ppi density)

Protection

Sapphire crystal glass

 

3D Touch display
1000 nits max brightness (advertised)

 

 

Specifications Serie 4 44mm

 

NETWORK

Technology

GSM / HSPA / LTE

2G bands

GSM 850 / 900 / 1800 / 1900

3G bands

HSDPA

4G bands

LTE

Speed

HSPA, LTE

LAUNCH

Announced

2018, September

Status

Available. Released 2018, September

BODY

Dimensions

44 x 38 x 10.7 mm (1.73 x 1.50 x 0.42 in)

Weight

48 g (1.69 oz)

Build

Glass front (Sapphire crystal), ceramic/sapphire crystal back, stainless steel frame

SIM

eSIM

 

50m water resistant
ECG certified (region dependent SW application; HW available on all models)

DISPLAY

Type

LTPO OLED capacitive touchscreen, 16M colors

Size

1.78 inches, 10.0 cm2 (~60.0% screen-to-body ratio)

Resolution

448 x 368 pixels (~326 ppi density)

Protection

Sapphire crystal glass

 

3D Touch display
1000 nits max brightness (advertised)

 

 

Specs Serie 4 40mm | 44mm

 

 

PLATFORM

OS

watchOS 5.0, upgradable to 6.2

Chipset

Apple S4

CPU

Dual-core

GPU

PowerVR

MEMORY

Card slot

No

Internal

16GB

CAMERA

 

No

   

SOUND

Loudspeaker

Yes

3.5mm jack

No

COMMS

WLAN

Wi-Fi 802.11 b/g/n

Bluetooth

5.0, A2DP, LE

GPS

Yes, with A-GPS, GLONASS, GALILEO, QZSS

NFC

Yes

Radio

No

USB

No

FEATURES

Sensors

Accelerometer, gyro, heart rate (2nd gen), barometer

 

Natural language commands and dictation (talking mode)

BATTERY

 

Non-removable Li-Ion battery

Charging

Wireless charging

Stand-by

Up to 18 h (mixed usage)

MISC

Colors

Space Black, Silver, Gold

Models

A1975, A1976, A2007, A2008

Disclaimer. We can not guarantee that the information on this page is 100% correct.