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iPhone 8

The iPhone 8 is a smartphone designed, developed, and marketed by Apple Inc. as part of its eleventh-generation iPhone lineup, announced on September 12, 2017, and released on September 22, 2017. It succeeded the iPhone 7 and was released alongside the larger iPhone 8 Plus and the flagship iPhone X, marking the introduction of wireless charging and an all-glass back design to the standard iPhone series. The device features a 4.7-inch Retina HD LCD display with a 1334-by-750-pixel resolution at 326 pixels per inch, True Tone technology for adaptive color temperature, and a maximum brightness of 625 nits. Built with an aerospace-grade aluminum frame and durable glass front and back, the iPhone 8 measures 5.45 by 2.65 by 0.29 inches and weighs 5.22 ounces, available in space gray, silver, and gold finishes. It is powered by the A11 Bionic chip, a hexa-core 64-bit with an embedded Neural Engine for tasks, paired with 2 GB of LPDDR4X and storage options of 64 GB or 256 GB. The rear camera system includes a single 12-megapixel with an ƒ/1.8 aperture, optical , and support for video recording at up to 60 frames per second, while the front-facing 7-megapixel HD camera has an ƒ/2.2 aperture. Additional features include IP67 water and dust resistance, fingerprint authentication via the home button, and compatibility with the wireless charging standard. The iPhone 8 launched with pre-installed and supports upgrades up to , with ongoing security updates as of 2025. It was priced starting at $699 for the 64 GB model and optimized for experiences through Apple's ARKit framework. The provides up to 14 hours of talk time, 12 hours of internet use, 13 hours of video playback, and 40 hours of audio playback, with fast charging capability to reach 50% in 30 minutes using a compatible .

Development and Release

Announcement

The iPhone 8 was announced on September 12, 2017, during Apple's special event at the in , . This marked the first major product unveiling at the newly opened campus. The event introduced the iPhone 8 alongside the iPhone 8 Plus, , and Series 3, with the iPhone 8 positioned as a direct evolution of the iPhone 7. Apple emphasized charging as a key advancement, enabled by the device's new glass back design. CEO described the iPhone 8 as the next generation of , highlighting the occasion as a celebration of the original iPhone's 10th anniversary. Among the teased specifications, Apple spotlighted the A11 Bionic chip as the most powerful processor in a at the time, the glass-backed aesthetic supporting Qi-standard charging, and the continued use of a 4.7-inch HD display.

Launch and Availability

The iPhone 8 and iPhone 8 Plus were made available for pre-order starting on September 15, 2017, across more than 25 countries and territories worldwide. General availability in stores and through carriers began one week later, on September 22, 2017, marking the official launch date for both models. In the United States, pricing for the iPhone 8 started at $699 for the 64 GB configuration and $849 for the 256 GB version, while the iPhone 8 Plus began at $799 for 64 GB and $949 for 256 GB. Regional pricing varied, with the 64 GB iPhone 8 listed at €799 in European markets such as . These prices reflected unlocked, SIM-free models, though carrier subsidies and financing plans often reduced effective costs for customers. Initial rollout focused on major markets including the , , the , , , , , , and others, totaling over 25 countries at launch. Availability expanded in subsequent weeks, with additional territories such as joining by October 20, 2017, bringing the total to dozens more as supply chains stabilized. In the US, the devices were distributed through all major carriers—AT&T, , , and Sprint—with partnerships enabling immediate access via retail stores, online platforms, and promotional offers like trade-in credits and installment plans. Production of the iPhone 8 was handled by contract manufacturers (Hon Hai Precision Industry), , and , primarily at assembly facilities in . The incorporated components from global partners, with an emphasis on US-sourced elements such as from Corning for the display and certain chipsets, supporting Apple's broader diversification efforts.

Design

Build Materials

The iPhone 8 features an aerospace-grade aluminum frame surrounding front and back panels, marking a return to construction after previous models utilized aluminum or backs. This design enhances the device's premium aesthetic while enabling charging capabilities. The aluminum frame is reinforced with for added structural integrity, contributing to the overall durability of the handset. The back panel, described by Apple as the most durable ever used in a , underwent a dual ion-exchange strengthening process that creates a 50% deeper layer to improve resistance to impacts. This shift to from the aluminum backs of prior iPhones, such as the , was primarily to support Qi-standard wireless charging by allowing efficient power transfer through the material. The front also incorporates an oleophobic coating to resist fingerprints and smudges, aiding in maintaining a clear surface over time. The iPhone 8 achieves an IP67 rating for dust and water resistance under the IEC 60529 standard, meaning it can withstand submersion in up to 1 meter of water for 30 minutes. This rating underscores the build's robustness against environmental factors, though Apple notes that liquid damage is not covered under . At 148 grams, the device offers a balanced weight that supports comfortable one-handed use and a refined handheld feel.

Dimensions and Colors

The iPhone 8 measures 138.4 mm in height, 67.3 mm in width, and 7.3 mm in depth, making it a compact device suitable for one-handed use while maintaining a slim profile. In contrast, the larger iPhone 8 Plus variant has dimensions of 158.4 mm in height, 78.1 mm in width, and 7.5 mm in depth, offering a bigger screen area at the cost of increased overall size. These measurements reflect Apple's design choice to retain the classic form factor with flat edges and a bezel around the display, ensuring compatibility with existing cases and accessories. Available in Space Gray, Silver, and Gold, with a (PRODUCT)RED variant introduced in March 2018, the iPhone 8 and iPhone 8 Plus feature a refined aesthetic with the aluminum sides treated to an anodized finish for enhanced durability and a premium matte texture that resists fingerprints. This finish complements the glass back, creating a seamless transition between materials while providing subtle color matching across the device's edges. The front of both models includes a physical button integrated into the , housing the fingerprint sensor for secure authentication and compatibility with protective cases that accommodate the button's placement. This design element preserves the familiar navigation experience from prior generations.

Hardware

Display

The 8 is equipped with a 4.7-inch diagonal HD display utilizing LCD technology, offering a of 1334 by 750 pixels at a pixel density of 326 for sharp image rendering. This display achieves a typical maximum brightness of 625 nits, enabling clear visibility in various lighting conditions, including outdoor environments. It incorporates True Tone technology, which dynamically adjusts the based on ambient light to reduce and provide a more natural viewing experience. Additionally, the wide color gamut support for the P3 color space enhances color accuracy and vibrancy, making it suitable for and photography review. The display features dual-domain pixels to maintain color consistency across wide viewing angles and operates at a 60 Hz , standard for smooth scrolling and animations at the time. For protection, it uses Ion-X strengthened with a fingerprint-resistant oleophobic coating to minimize smudges and resist scratches. The iPhone 8 Plus variant expands on this with a larger 5.5-inch diagonal HD display, also based on LCD technology, featuring a higher of 1920 by 1080 pixels at 401 for greater detail on the bigger screen. It shares the same 625 nits maximum brightness, True Tone, P3 wide color support, 60 Hz , and Ion-X glass protection with oleophobic coating as the , ensuring comparable visual performance in a more spacious .

Processor and Storage

The iPhone 8 is powered by the chipset, a 64-bit ARM-based () fabricated on a by . This features a hexa-core CPU consisting of two high-performance "Monsoon" cores and four high-efficiency "Mistral" cores, along with a three-core Apple-designed GPU. The also introduced Apple's first dedicated Neural Engine, a dual-core unit capable of up to 600 billion operations per second for tasks such as image recognition. In terms of performance, the A11 Bionic's performance cores deliver up to 25% faster processing than the A10 Fusion in the , while the efficiency cores provide up to 70% faster performance; the GPU achieves up to 30% better graphics rendering compared to its predecessor. This design enables up to 70% greater overall CPU performance in multi-threaded workloads, marking a significant advancement in efficiency. The chipset's second-generation performance controller further optimizes power usage and speed for demanding applications. The iPhone 8 includes 2 GB of LPDDR4X in the standard model, while the iPhone 8 Plus features 3 GB of the same memory type, supporting smooth multitasking and app performance without official expandability options. Storage is available in 64 GB and 256 GB internal options at launch, with no microSD card slot for expansion and no 128 GB variant initially offered.

Cameras

The iPhone 8 features a single 12-megapixel rear wide-angle camera with an , a 28mm equivalent , phase detection (PDAF), and optical image stabilization () to reduce blur in photos and videos. The sensor incorporates back-illuminated (BSI) technology with 1.22 µm pixels, a larger and faster design compared to previous models, along with a new color filter for improved low-light performance and deeper pixel processing via an Apple-designed signal . It supports video recording at up to 60 , at 120 or 240 for slow-motion, and formats including HEIF for photos and HEVC for video, enabling efficient storage of high-quality media. A quad-LED True Tone flash with Slow Sync provides balanced illumination for portraits and group shots. The front-facing FaceTime HD camera on the iPhone 8 is a 7-megapixel with an f/2.2 , supporting HD video at 30 , wide color capture, and Auto for portraits. It includes Retina Flash, which uses the display to illuminate selfies in low light, along with burst mode and auto . The iPhone 8 Plus upgrades the rear camera system to a dual 12-megapixel setup, combining the same (f/1.8, 28mm, PDAF, , 1.22 µm pixels) with a (f/2.8 , 52mm equivalent) for 2x optical and up to 10x . This configuration enables mode, which uses depth mapping from both sensors to create a bokeh effect with adjustable depth control, and Portrait Lighting (beta) with five studio-style effects powered by . Video capabilities match the iPhone 8, including at 60 with optical and stabilization, while the front camera remains identical at 7 megapixels with f/2.2 and Retina Flash. Both models support HEIF and HEVC formats across their imaging systems for enhanced efficiency.

Battery and Power

The iPhone 8 features a built-in rechargeable with a capacity of 1821 mAh for the and 2691 mAh for the iPhone 8 . These non-removable batteries up to 14 hours of talk time and up to 12 hours of use on the , while the Plus variant extends this to up to 21 hours of talk time and 13 hours of use. Video playback is rated for up to 13 hours on the iPhone 8 and 14 hours on the Plus, reflecting Apple's emphasis on balanced delivery for daily tasks. Charging options for the iPhone 8 include wired fast charging via the port, achieving up to 50% charge in approximately 30 minutes when paired with an 18W power adapter (sold separately). It also introduces wireless charging compatibility with -certified chargers, supporting speeds up to 7.5W after an update. This dual-method approach enhances user convenience without requiring proprietary accessories beyond standard pads. Power efficiency in the iPhone 8 benefits from optimizations in the A11 Bionic chip, which compensates for the slightly smaller capacity compared to the (1821 mAh versus 1960 mAh) to deliver comparable overall endurance. The chip's design improvements enable sustained performance with minimal drain during mixed usage, maintaining life similar to its predecessor despite added features like wireless charging hardware. The device integrates redesigned speakers tuned for better audio output, providing up to 25% louder volume and deeper response than the iPhone 7's mono setup. This enhancement supports richer sound for media playback and calls while drawing efficiently from the battery to avoid excessive power consumption.

Software and Features

Operating System

The iPhone 8 shipped with as its initial operating system, which was publicly released on September 19, 2017, three days before the device's launch. The iPhone 8 received major iOS updates up to version 16 and continues to receive security updates as of 2025. introduced several key enhancements to the and functionality, including a more customizable Control Center that allowed users to rearrange and add controls for quicker access to settings like , , and screen brightness from a single page. Additionally, it debuted ARKit, a framework enabling developers to build applications leveraging the iPhone 8's A11 Bionic chip and cameras for immersive experiences such as virtual object placement in real-world environments. The interface on for the iPhone 8 featured a traditional layout with a physical Touch ID-enabled home button for unlocking and authentication, surrounded by bezels without the notch design introduced on the contemporaneous . received notable enhancements, including more natural-sounding voices, on-device for personalized suggestions, and support for translations between languages like English and . integration was deepened, allowing peer-to-peer payments directly through Messages or voice commands via , with transactions secured via an Cash account. Security in iOS 11 relied on the Secure Enclave, a dedicated that securely stores and processes biometric data from , ensuring fingerprints are never exposed to the main processor or apps. Complementing this, enforced app sandboxing, which isolates applications in unique containers to prevent unauthorized access to other apps' data or system resources, thereby enhancing overall privacy and protection against . Customization options were expanded in , with the Notification Center's Today view supporting widgets for at-a-glance information from apps like , , and , allowing users to add, remove, or reorder them for personalized quick views. The introduction of the Files app provided a unified for managing documents across storage and cloud services such as Drive and third-party providers like , simplifying file organization and access without needing multiple apps.

Key Features

The iPhone 8 introduced built-in wireless charging support adhering to the Qi standard, enabled by its glass back design, allowing compatibility with a range of Qi-certified charging pads and mats available as accessories. This feature marked the first implementation of wireless charging in the standard iPhone series, with charging speeds up to 7.5 watts on compatible pads. The device was also designed to work with Apple's AirPower charging mat, announced in 2017 for simultaneous charging of the iPhone, Apple Watch, and AirPods, though AirPower was ultimately canceled in 2019 due to challenges in meeting Apple's standards for thermal management and efficiency. Leveraging the A11 Bionic chip's advanced processing capabilities, including its dedicated Neural Engine, the iPhone 8 supported (AR) experiences through ARKit, Apple's developer framework for creating immersive AR applications. The A11 Bionic enabled real-time world tracking, scene understanding, and high-fidelity graphics rendering at 60 frames per second, powered by custom-tuned cameras, gyroscopes, and accelerometers for precise and light estimation. This hardware-software integration allowed developers to build fluid AR games and apps, such as virtual furniture placement or interactive educational tools, establishing the iPhone 8 as a foundational device for mobile AR. The iPhone 8 featured an enhanced Taptic Engine, a linear resonant actuator providing precise haptic feedback for interactions like 3D Touch gestures and notifications, delivering nuanced vibrations that simulate physical button presses or contextual responses. This component, refined from prior models, integrated with to offer customizable haptic patterns, including support for Core Haptics introduced in later updates, allowing synchronized audio and tactile experiences in apps. Complementing this, the device included redesigned stereo speakers tuned by Apple, offering up to 25 percent louder output with deeper bass and wider dynamic range, providing an early foundation for spatial audio-like immersion in music, videos, and calls through balanced left-right channel separation. In terms of connectivity, the iPhone 8 incorporated with reader mode, enabling secure contactless payments via by emulating a contactless card for transactions at compatible terminals. It also supported 5.0, which provided improved range, speed, and energy efficiency for pairing with accessories like headphones and smartwatches compared to previous versions. Additionally, the device featured (Category 12/13) with 2x2 and LAA support in select regions, enabling theoretical peak download speeds up to 600 Mbps on compatible networks through advanced across multiple LTE bands.

Reception and Sales

Critical Response

The iPhone 8 received generally positive reviews from professional critics, who commended its evolutionary refinements in performance and features, particularly the introduction of wireless charging and the powerful A11 Bionic processor. The A11 chip, with its six-core architecture and custom GPU, was lauded for delivering exceptional speed in everyday tasks and graphics-intensive applications, positioning the device as a leader in mobile processing at its 2017 launch. Wireless charging, enabled by the glass-backed design and compatibility, was praised as a convenient upgrade for users seeking cable-free options, though charging speeds were noted as slower than wired alternatives. Critics, however, viewed the iPhone 8 as a conservative update rather than a revolutionary step, especially when compared to the more innovative with its edge-to-edge display and . The design, largely carried over from the , was seen as dated amid slimmer-bezel competitors. Battery life was described as solid for a full day of moderate use but not a standout improvement, with real-world endurance around 12-13 hours for video playback and web browsing. The Verge rated it 8/10, dubbing it "the best small iPhone" for fans of compact, familiar form factors. scored it 8.4/10, appreciating the refinements but highlighting its overshadowed status. The rear camera earned praise for enhancements via a new and , including better low-light performance with improved detail and reduced noise compared to the 7. However, the single 12-megapixel lens was limited without the dual-camera system's optical zoom or advanced effects available on the 8 Plus. Overall scores averaged around 4.5 out of 5 across major outlets, with awarding 4/5 for its reliability and speed despite the lack of bold changes.

Commercial Performance

The launch of the 8 and iPhone 8 Plus in late September 2017 bolstered Apple's fiscal fourth quarter results, with the company reporting of $52.6 billion and iPhone unit sales of 46.8 million despite the models being available for only eight days in the period. In Apple's fiscal first quarter of 2018—the first full quarter following the launch—iPhone sales reached a then-record 77.3 million units, driving $61.6 billion in revenue and reflecting strong demand for the series alongside the . These figures helped the lineup secure approximately 19% of the global market in 2017. In the United States, iPhones commanded a 44% that year, underscoring the model's robust regional performance. The iPhone 8's base price of $699 positioned it as a more accessible option relative to the $999 , encouraging higher volume sales among cost-conscious consumers. Among variants, the iPhone 8 Plus outperformed the standard iPhone 8 by 20-30%, largely due to consumer interest in its dual rear camera setup.

Issues and Legacy

Hardware Problems

The iPhone 8 encountered reports of swelling, where gas buildup from degrading lithium-ion cells caused the rear panel to separate from the . This issue, observed in some units over time, posed safety risks and led to recommendations for immediate power-off and professional service. Apple provides free replacements for affected devices under its service policy if the retains less than 80% of original or exhibits swelling as a defect, with the program available through authorized providers. Audio problems affected the iPhone 8's earpiece speaker, with multiple users reporting intermittent crackling or static noise during phone calls over cellular or connections. Apple acknowledged the defect in September and resolved it for most devices via a software update in 11.0.2, which addressed audio processing glitches. However, persistent cases in certain units suggested underlying hardware failures in the speaker assembly, requiring component replacement at authorized service centers. Durability concerns arose with the iPhone 8's glass rear panel, designed to enable charging but vulnerable to shattering from drops despite Apple's claims of using its strongest to date. Independent drop tests from a height of 6 feet onto demonstrated repeated cracking of the back on both the iPhone 8 and 8 Plus, earning breakability scores of 67 and 74 out of 160, respectively, indicating higher fragility compared to metal-backed predecessors. Repairing the shattered back falls under Apple's "other damage" category, costing $349 out-of-warranty, which exceeds the $149 fee for front screen repairs and highlights the design's maintenance challenges. Additional hardware issues included gradual degradation in Touch ID performance over time, where the home button sensor became less responsive or accurate for fingerprint recognition, potentially due to wear or sensor buildup. Apple advises cleaning the sensor with a lint-free cloth and ensuring iOS is updated to mitigate such problems, though severe cases may necessitate home button replacement. The device also experienced overheating during charging sessions, especially wireless, as the inductive process generates excess heat that can temporarily pause charging to protect the battery; users are instructed to unplug and cool the iPhone in a moderate environment if temperatures exceed safe limits.

Software Support End

The iPhone 8 originally shipped with in September 2017. It received major iOS updates through , released in September 2022, marking the end of feature updates for the device. Security patches continued for the iPhone 8 until , issued on September 15, 2025. Subsequent major versions from to introduced enhancements such as improved performance and privacy controls in (2018), system-wide Dark Mode in (2019), and the App Library for organized app access in (2020). These updates extended usability but were the final major releases, as the device was excluded from (2023) onward due to hardware limitations of its A11 Bionic chip, which lacks the neural engine capabilities required for newer iOS features. The cessation of software support after September 2025 means the iPhone 8 no longer receives security updates, increasing vulnerability to emerging threats such as unpatched exploits that could compromise data. This poses risks for sensitive applications, including banking apps that may discontinue compatibility with to enforce stricter security standards. Additionally, owners miss out on advanced features like Apple Intelligence, introduced in iOS 18.1 (2024), which requires or later models. Despite these limitations, the iPhone 8 continues to run smoothly for everyday tasks in 2025, maintaining compatibility with many core apps and services, though it cannot access the latest ecosystem integrations or app updates requiring +.

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