HMD Skyline specifications and in-depth review

HMD Skyline

Manufacturer: HMD

The HMD Skyline is a mid-range smartphone that brings together a capable hardware package with a focus on repairability and user control. Its 6.55″ OLED display delivers a resolution of 1080 x 2400 px at 402 ppi, with a 144Hz refresh rate and HDR10 support, while Gorilla Glass 3 provides a layer of screen protection. The device runs Android 14 and ships with 256GB of internal storage alongside 12GB of RAM, giving it a solid foundation for day-to-day use. Notably, the HMD Skyline carries a perfect French Repairability Index score of 10, and its battery is user-removable — a relatively uncommon feature in modern smartphones.

Under the hood, the Skyline is powered by the Qualcomm Snapdragon 7s Gen 2, a 4nm chipset with an octa-core CPU configuration running at up to 2.4 GHz and an Adreno 710 GPU clocked at 940 MHz. On the camera front, the rear system consists of 108MP, 50MP, and 13MP sensors with optical image stabilization and 2x optical zoom, while a 50MP front camera handles selfies and video calls. Charging is handled at 33W over USB Type-C, with 15W wireless charging and 5W reverse wireless charging also supported. Connectivity options include 5G, Wi-Fi 6E, Bluetooth 5.2, NFC, and a hybrid SIM tray that accommodates one physical SIM alongside one eSIM. The device holds an IP54 rating for water and dust resistance.

Pros
  • The battery is user-removable, a feature that gives owners the ability to replace it without professional assistance
  • Wireless charging is supported at 15W, and the device can also reverse-wirelessly charge other devices at 5W
  • The 144Hz OLED display with Always-On support and HDR10 provides smooth, responsive visuals
  • A perfect French Repairability Index score of 10 indicates the device is designed to be straightforward to repair
  • The triple rear camera system supports RAW shooting along with a broad set of manual controls including ISO, exposure, focus, and white balance
  • Wi-Fi 6E support enables faster and less congested wireless connectivity on compatible networks
Cons
  • The IP54 rating offers only splash resistance and does not protect against submersion in water
  • There is no 3.5mm headphone jack, requiring an adapter or wireless headphones for wired audio
  • USB connectivity is limited to USB 2.0 despite using a Type-C connector, which restricts data transfer speeds
  • OS updates are not delivered directly from the vendor, which may affect the timeliness of software and security updates
  • The rear flash is a single LED unit with no dual-tone configuration, which can limit the quality of flash photography in mixed lighting
Who is this for?

This device is a good fit for users who prioritize repairability and long-term ownership, given its perfect French Repairability Index score and user-removable battery. The combination of a 144Hz OLED display, 12GB of RAM, and a Snapdragon 7s Gen 2 chipset makes it well-suited for everyday users who want a fluid, responsive experience without demanding the absolute highest tier of processing power. Those who value camera versatility will also find the triple rear system appealing, with its broad manual controls, RAW capture, optical image stabilization, and 2x optical zoom covering a wide range of shooting scenarios. The inclusion of Wi-Fi 6E, 5G, NFC, and an external memory slot further makes it a practical choice for users who want a well-rounded, connectivity-rich handset with room to expand storage.

Who is this NOT for?

Users who frequently shoot or work near water should be aware that the IP54 rating does not provide submersion protection, making it unsuitable for activities involving direct water exposure such as swimming, diving, or heavy rain. The USB 2.0 standard on the Type-C port will frustrate those who regularly transfer large files between their device and a computer, as the data transfer ceiling is considerably limited. The absence of a 3.5mm headphone jack makes it a poor match for users who rely on wired audio peripherals without adapters. Additionally, the Snapdragon 7s Gen 2 is not positioned for the most demanding workloads, so users with intensive requirements such as sustained high-end gaming or heavy video editing may find the GPU and CPU performance insufficient for their needs.

Design:

water resistance Water resistant
weight 209.5 g
thickness 8.9 mm
width 75.656 mm
height 159.8 mm
volume 107.59947632 cm³
Ingress Protection (IP) rating IP54
French Repairability Index 10
has a rugged build
can be folded

The HMD Skyline has a standard candybar form factor — it does not fold and is not built to rugged standards. It measures 159.8 mm tall, 75.656 mm wide, and 8.9 mm thick, with a total volume of approximately 107.6 cm³ and a weight of 209.5 g. The device carries an IP54 rating, meaning it offers protection against dust ingress and water splashing from any direction. One of its more distinctive design traits is a perfect French Repairability Index score of 10, reflecting that the device has been assessed as highly repairable under the French regulatory framework.

Display:

Display type OLED/AMOLED
screen size 6.55"
pixel density 402 ppi
resolution 1080 x 2400 px
refresh rate 144Hz
has branded damage-resistant glass
Gorilla Glass version Gorilla Glass 3
supports HDR10
supports HDR10+
Always-On Display
supports Dolby Vision
Has a secondary screen
has a touch screen

The HMD Skyline features a 6.55″ OLED/AMOLED touchscreen with a resolution of 1080 x 2400 px and a pixel density of 402 ppi. Its 144Hz refresh rate allows for smooth on-screen motion, and the panel supports HDR10 and an Always-On Display mode, though HDR10+ and Dolby Vision are not supported. The screen is protected by Gorilla Glass 3, and there is no secondary display. The device does not have a second screen.

Performance:

internal storage 256GB
RAM 12GB
Chipset (SoC) name Qualcomm Snapdragon 7s Gen 2
GPU name Adreno 710
CPU speed 4 x 2.4 & 4 x 1.95 GHz
Geekbench 6 result (multi) 2970
Geekbench 6 result (single) 1015
PCMark Work 3.0 performance benchmark 9492
PCMark Work 3.0 battery benchmark 816 minutes
3DMark Steel Nomad benchmark 254
GPU clock speed 940 MHz
Has integrated LTE
RAM speed 3200 MHz
semiconductor size 4 nm
Supports 64-bit
DirectX version DirectX 12
Has integrated graphics
OpenGL version 3.2
OpenGL ES version 3.2
Uses big.LITTLE technology
CPU threads 8 threads
Uses HMP
Has TrustZone
maximum memory bandwidth 25.6 GB/s
OpenCL version 2
memory channels 2
maximum memory amount 16GB
uses multithreading
Thermal Design Power (TDP) 5W
DDR memory version 5
turbo clock speed 2.4GHz

The HMD Skyline is powered by the Qualcomm Snapdragon 7s Gen 2, a 4nm chipset featuring an octa-core CPU arranged in a big.LITTLE configuration with four cores running at 2.4 GHz and four at 1.95 GHz, supported by Heterogeneous Multi-Processing and 8 threads in total. The SoC includes integrated LTE, TrustZone security, and an Adreno 710 GPU clocked at 940 MHz with support for DirectX 12, OpenGL 3.2, OpenGL ES 3.2, and OpenCL 2. The device ships with 12GB of DDR5 RAM running at 3200 MHz across two memory channels, with a maximum supported memory amount of 16GB and a peak bandwidth of 25.6 GB/s, alongside 256GB of internal storage. The chipset has a thermal design power of 5W and a turbo clock speed of 2.4 GHz. In benchmarks, the device scores 1015 in Geekbench 6 single-core and 2970 multi-core, 9492 in PCMark Work 3.0 performance with a battery endurance result of 816 minutes, and 254 in 3DMark Steel Nomad.

Cameras:

megapixels (main camera) 108 & 50 & 13 MP
Has a dual-lens (or multi-lens) main camera
megapixels (front camera) 50MP
has built-in optical image stabilization
video recording (main camera) 2160 x 30 fps
Has a dual-tone LED flash
number of flash LEDs 1
has a BSI sensor
has a CMOS sensor
has continuous autofocus when recording movies
Has phase-detection autofocus for photos
supports slow-motion video recording
has a built-in HDR mode
has manual exposure
has a flash
optical zoom 2x
has manual ISO
has a serial shot mode
has manual focus
has a front camera
Has laser autofocus
Shoots 360° panorama
has manual white balance
shoots raw
has touch autofocus
has manual shutter speed
can create panoramas in-camera
Has timelapse function
Has a front-facing LED flash
has a dual-lens (or multi-lens) front camera
supports HDR10 recording
supports Dolby Vision recording
has a front-facing camera under the display
Has a RGB LED flash
has 3D photo/video recording capabilities

The HMD Skyline has a triple-lens rear camera system with sensors at 108MP, 50MP, and 13MP, backed by a CMOS sensor, optical image stabilization, and 2x optical zoom. Autofocus options include phase-detection and touch autofocus for photos as well as continuous autofocus during video recording, though laser autofocus is not available. The rear camera supports 4K video recording at 30 fps, slow-motion capture, timelapse, HDR mode, burst mode, and in-camera panoramas, while RAW shooting and manual controls for exposure, ISO, focus, and white balance are also on hand — manual shutter speed, however, is not supported. Video recording does not include HDR10 or Dolby Vision output, and 3D capture is absent as well. A single LED flash is fitted at the rear with no dual-tone or RGB configuration, and there is no front-facing flash. The 50MP front camera is a single-lens unit positioned above the display rather than beneath it, and it does not have its own flash.

Operating system:

Android version Android 14
has clipboard warnings
has location privacy options
has camera/microphone privacy options
has Mail Privacy Protection
has theme customization
can block app tracking
blocks cross-site tracking
has on-device machine learning
has notification permissions
has media picker
Can play games while they download
has dark mode
has Wi-Fi password sharing
has battery health check
has an extra dim mode
has focus modes
has dynamic theming
can offload apps
Has customizable notifications
has Live Text
has full-page screenshots
supports split screen
gets direct OS updates
has PiP
Can be used as a PC
Has sharing intents
has a child lock
Supports widgets
Is free and open source
Has offline voice recognition
has voice commands
Tracks the current position of a mobile device
is a multi-user system
has Quick Start

The HMD Skyline runs Android 14, a free and open-source operating system that supports multiple user accounts and includes on-device machine learning alongside offline voice recognition and voice commands. On the privacy side, the OS offers clipboard warnings, location privacy controls, and camera and microphone access management, along with the ability to block app tracking — though cross-site tracking blocking and Mail Privacy Protection are not present. Customization options include dark mode, dynamic theming, theme customization, widgets, and customizable notifications, while focus modes and app offloading are not available. The system also supports split-screen multitasking, Picture-in-Picture, full-page screenshots, a media picker, Live Text, sharing intents, a child lock, battery health check, and an extra dim mode. Games can be played while downloading, and phone tracking is supported, but Wi-Fi password sharing, Quick Start, and the ability to use the device as a PC are not included. OS updates are not delivered directly from the vendor.

Battery:

battery power 4600 mAh
has wireless charging
Supports fast charging
charging speed 33W
wireless charging speed 15W
has reverse wireless charging
reverse wireless charging speed 5W
comes with a charger
has a removable battery
has a battery level indicator
has a rechargeable battery

The HMD Skyline houses a 4600 mAh removable rechargeable battery with a battery level indicator, and a charger is included in the box. Wired fast charging is supported at 33W, while wireless charging runs at 15W. The device also supports reverse wireless charging at 5W, allowing it to share power with other compatible devices.

Audio:

has a socket for a 3.5 mm audio jack
has stereo speakers
has aptX
has LDAC
has aptX HD
has aptX Adaptive
has aptX Lossless
Has a radio

The HMD Skyline features stereo speakers and supports both aptX and aptX HD for higher-quality Bluetooth audio transmission, though aptX Adaptive, aptX Lossless, and LDAC are not available. The device does not include a 3.5mm headphone jack, and there is no built-in radio.

Connectivity & Features:

has 5G support
Wi-Fi version Wi-Fi 4 (802.11n), Wi-Fi 6E (802.11ax), Wi-Fi 6 (802.11ax), Wi-Fi 5 (802.11ac)
SIM cards 1 SIM, 1 eSIM
Bluetooth version 5.2
has an external memory slot
Has USB Type-C
USB version 2
has NFC
download speed 2900 MBits/s
upload speed 1500 MBits/s
Has a fingerprint scanner
has emergency SOS via satellite
has crash detection
is DLNA-certified
has a gyroscope
supports ANT+
Has a heart rate monitor
has GPS
has a compass
supports Wi-Fi
Has an infrared sensor
has an accelerometer
has a cellular module
Has a barometer
has an HDMI output
Uses 3D facial recognition
Has an iris scanner
Stylus included
supports Galileo
Has motion tracking
Has optical tracking
Has a built-in projector

The HMD Skyline supports 5G connectivity and comes with a cellular module, accommodating one physical SIM alongside one eSIM. Wi-Fi coverage spans Wi-Fi 4, 5, 6, and 6E, and the device reaches theoretical download speeds of 2900 Mbit/s and upload speeds of 1500 Mbit/s. Bluetooth 5.2 and NFC are both present, and the handset connects via USB Type-C with USB 2.0. An external memory slot is available for storage expansion. On the sensor side, the device includes a fingerprint scanner, gyroscope, accelerometer, compass, barometer, GPS, and Galileo satellite navigation support. Features such as crash detection, emergency SOS via satellite, ANT+, a heart rate monitor, infrared sensor, DLNA certification, 3D facial recognition, iris scanner, HDMI output, motion tracking, optical tracking, and a built-in projector are all absent. No stylus is included in the box.

Miscellaneous:

has a video light
Has sapphire glass display
Has a curved display
Has an e-paper display

The HMD Skyline includes a video light for use during video recording. The display is flat rather than curved, and the device uses neither sapphire glass nor an e-paper screen.

Final Verdict

The HMD Skyline is a thoughtfully constructed smartphone that stands out for its user-removable battery and perfect French Repairability Index score, positioning it as an unusually repairable device in a market where such traits have become rare. Backed by a 144Hz OLED display, a capable Snapdragon 7s Gen 2 chipset, versatile triple rear cameras with extensive manual controls, and a broad connectivity suite including 5G and Wi-Fi 6E, it covers the fundamentals competently for everyday and intermediate users. Certain trade-offs — including its splash-only IP54 rating, USB 2.0 data speeds, and the absence of a headphone jack — mean it is not the right fit for every type of user, but these are reasonable constraints within its intended scope. For those who value repairability, longevity, and a well-rounded feature set over raw flagship performance, the HMD Skyline makes a coherent and deliberate case for itself.

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