The Xiaomi Mi 8 is a 2018 flagship smartphone that positioned itself as a refined iteration of Xiaomi’s high-value approach to premium hardware. It features a glass and aluminum chassis, a 6.21‑inch FullHD+ AMOLED display with a notable screen‑to‑body ratio, and a Snapdragon 845 processor that delivers flagship-level compute performance. The device combines dual‑camera setups on the back with a high‑resolution front camera, and it was among the earliest Xiaomi phones to adopt on‑device AI features for imaging and face unlocking. This profile explains what the Mi 8 is, how it performs, and how it holds up in everyday use so readers can judge its relevance today.
Design and Build
The Mi 8 presents a polished, glass‑and‑metal design that aligns with Xiaomi’s shift toward a more premium aesthetic. Its aluminum frame and curved glass back contribute to a slim profile, while the removal of the 3.5 mm headphone jack enabled a tighter bezel footprint. The device supports NFC, dual‑band Wi‑Fi, Bluetooth 5, and GPS, with IP53‑level dust and splash resistance that balances durability without overstating water protection. Weighing in at 175 grams, it aims to pair premium materials with one‑handed usability, although users with smaller hands may still find the 6.2‑inch display reaching toward the limit of comfortable single‑handed operation.
Display
The Mi 8 mounts a 6.21‑inch AMOLED panel at FullHD+ resolution (2246×1080), offering vibrant colors, deep blacks, and good outdoor readability. The display‑to‑body ratio is strong for its time, with minimal bezies and a small chin, while the screen‑to‑body ratio is frequently cited as a high point of the device. Peak brightness is sufficient for daylight readability, though it does not reach the very high levels seen on some later flagships. Color calibration is close to sRGB in default mode, making the screen suitable for both media consumption and casual content creation.
Physical Specs at a Glance
| Attribute | Verified Detail | Source Type |
|---|---|---|
| Dimensions (H×W×D) | 154.9×74.8×7.6 mm | Manufacturer specifications |
| Weight | 175 g | Manufacturer specifications |
| Battery | 3,400 mAh | Manufacturer specifications |
| Charging | Qualcomm Quick Charge 4+ (18W wired) | Manufacturer specifications |
| Rear Cameras | 12 MP f/1.8 + 12 MP telephoto (2x) | Manufacturer specifications |
| Front Camera | 20 MP f/2.0 | Manufacturer specifications |
| Processor | Qualcomm Snapdragon 845 | Manufacturer specifications |
| RAM / Storage | 6 GB / 64 GB or 8 GB / 128 GB | Manufacturer specifications |
| OS at Launch | Android 8.1 with MIUI 9 | Manufacturer specifications |
Performance and SoC
At the heart of the Mi 8 lies the Snapdragon 845, a mature but still competitive flagship chip in 2018. The 10nm process and Kryo 385 cores provide strong CPU performance that handles everyday tasks smoothly and sustains high performance in short bursts. GPU performance is robust for its generation, capable of running most 2018 titles at medium to high settings on 1080p. Efficiency is reasonable, though heavy gaming or extended GPS usage can push thermals and fan activity. For most users, the Mi 8 offers a balanced experience that prioritizes consistent app launch times, fluid scrolling, and responsive multitasking.
Real-World Usage Patterns
- Daily navigation and social apps: Generally smooth, with minimal stutter.
- Multitasking with several apps: 6–8 GB of RAM supports background retention for the majority of commonly used apps.
- Media playback: 1080p video plays without excessive throttling; HD content is well suited.
- Photography: Sufficient processing power for on‑device AI features, scene detection, and quick capture-to‑share workflows.
Camera System
The Mi 8 employs a dual‑rear camera module: a 12 MP primary sensor with f/1.8 aperture paired with a 12 MP telephoto lens offering 2x optical zoom. This combination enables stronger detail retention at higher pixel counts and modest optical zoom for tighter framing. The front camera uses a 20 MP sensor with f/2.0 aperture, which was considered high resolution for 2018 and supports AI‑based face unlock and beauty modes. Image processing leans on multi‑frame capture and software enhancements to improve dynamic range, reduce noise, and preserve color fidelity in varied lighting conditions.
Camera Feature Set
- Dual‑pixel PDAF on the main sensor for faster focusing.
- AI scene detection to optimize processing per subject.
- Face unlock powered by a dedicated AI engine and front camera.
- Video capture up to 4K at 30 fps, with gyro‑EIS to reduce shake.
Battery and Charging
A 3,400 mAh battery provides a full day of typical usage for most users, comfortably spanning mixed workloads that include messaging, browsing, social media, and intermittent media playback. Charging is supported via Qualcomm Quick Charge 4+ at up to 18W, which is efficient but not class leading; third‑party 18–25W USB‑C PD bricks are often compatible and can top up the device in under an hour. Battery longevity over 2018–2024 use varies with battery health and charging habits, with many units still holding usable capacity when cycles are managed conservatively.
Software and Updates
The Mi 8 launched with Android 8.1 Oreo layered with MIUI 9, and Xiaomi subsequently rolled out Android 9 Pie and Android 10 updates with MIUI iterations aligned to Google’s release cadence. Security patches were issued on a roughly monthly basis during the active support window. By 2024, the device remains on later Android versions relative to many contemporaries, though it no longer receives major OS upgrades. The software experience emphasizes feature richness, with themes, gesture navigation, and AI assisted shortcuts; some users may encounter app compatibility hiccups as newer applications demand more resources than the 845 can sustain at peak.
Value, Longevity, and Practical Assessment
Positioned as a value‑oriented flagship, the Mi 8 delivers strong hardware for its time at a competitive price point. In 2024, it remains viable for secondary roles such as a household media device, a travel phone, or a budget‑conscious daily driver if you manage expectations around gaming intensity and latest app demands. Its strengths include a high‑quality display, competent cameras for everyday shooting, solid build, and reliable connectivity. Considerations include battery wear over time, gradual storage filling, and the absence of the newest Android features that appear on 2022–2023 devices. When compared with similarly aged flagships, the Mi 8 strikes a balance of premium design and flagship components that still hold up for everyday tasks.