iPhone 12 • Unlocked vs iPhone 15 • Unlocked

The iPhone 12, released in October 2020, and the iPhone 15, launched in September 2023, represent different generations within Apple's smartphone lineup. While both devices share a similar design philosophy with flat edges and run on the iOS operating system, the iPhone 15 introduces notable advancements in camera technology, processing power, and display features. These differences cater to varying user needs, from those seeking a capable everyday device to users prioritizing the latest technological enhancements.

The practical lifespan of a smartphone is often determined by its software support and physical durability. Both the iPhone 12 and iPhone 15 offer robust build quality, but their release timelines significantly impact their expected longevity.

• Software Support: The iPhone 12, released in 2020, is expected to receive major iOS updates for a few more years, likely until iOS 18 or 19, extending its functional life to around 2025 or 2026. In contrast, the iPhone 15, launched in 2023, is anticipated to receive major OS updates until approximately 2028-2030, offering a longer period of access to new features and security patches. Apple typically provides 5-7 years of major iOS updates and extended security support for its devices.
• Repairability: The iPhone 12 initially received a repairability score of 6 out of 10 from iFixit, though some repairs were complicated by part pairing requirements. The iPhone 15, however, saw an improvement in repairability for its standard models, with some sources indicating a score of 7 out of 10, making certain repairs more accessible. Both models feature Ceramic Shield front covers and an IP68 rating for water and dust resistance, contributing to their physical resilience.
• Expected Lifespan: Users can expect the iPhone 15 to remain a fully supported and capable device for a longer duration due to its more recent release and extended software update window. The iPhone 12, while still functional, is closer to the end of its major software support cycle.

Performance is a key differentiator between these two iPhone generations, impacting everything from app loading times to multitasking efficiency and gaming experiences.

• Processing Power: The iPhone 12 is equipped with a capable processor that handles everyday tasks and most applications smoothly. The iPhone 15 features a newer generation processor, providing a noticeable boost in speed and efficiency. This translates to faster app launches, smoother transitions between applications, and more responsive performance in demanding tasks like video editing or graphically intensive games.
• Multitasking and Responsiveness: The iPhone 15 includes more RAM compared to the iPhone 12 (6GB vs 4GB). This increased memory allows the iPhone 15 to manage more applications simultaneously without needing to reload them, resulting in a more fluid multitasking experience. Users will find the overall system responsiveness to be snappier on the newer model.
• Battery Behavior: The iPhone 15 generally offers improved battery life compared to the iPhone 12, with up to 20 hours of video playback versus 17 hours. This is attributed to a larger battery capacity and a more power-efficient processor in the iPhone 15. Furthermore, Apple has indicated that the iPhone 15's battery is designed to retain 80% of its capacity after 1000 charge cycles, double the previous expectation, suggesting better long-term battery health.

Both devices feature high-quality OLED displays, but the iPhone 15 introduces several enhancements that improve the viewing experience, particularly in bright conditions and user interaction.

• Display Technology and Clarity: Both the iPhone 12 and iPhone 15 utilize 6.1-inch Super Retina XDR OLED displays, offering deep blacks and vibrant colors. The resolution is very similar, providing sharp text and images on both devices.
• Brightness Levels: A significant difference lies in brightness. The iPhone 12 has a typical maximum brightness of 625 nits and a peak HDR brightness of 1200 nits. The iPhone 15 substantially increases these figures, offering a typical brightness of 1000 nits, a peak HDR brightness of 1600 nits, and an impressive peak outdoor brightness of 2000 nits. This makes the iPhone 15's screen much easier to view in direct sunlight.
• User Interface and Refresh Rate: While both phones maintain a standard 60Hz refresh rate, the iPhone 15 replaces the traditional notch with the Dynamic Island. This interactive area adapts to show alerts, activities, and background tasks, offering a more modern and dynamic user experience.

The camera systems on both iPhones are capable, but the iPhone 15 brings substantial upgrades, particularly to the main sensor and computational photography features.

• Main Camera System: The iPhone 12 features a dual 12-megapixel camera system with a wide and an ultra-wide lens. The iPhone 15 significantly upgrades this with a 48-megapixel main camera, which by default captures 24-megapixel photos, and a 12-megapixel ultra-wide camera. This larger sensor on the iPhone 15 allows for greater detail capture and improved performance.
• Low-Light Photography and Zoom: The iPhone 15's larger main sensor and advanced processing lead to much better low-light photos, producing brighter images with more detail and less noise compared to the iPhone 12. The iPhone 15 also offers a high-quality 2x optical zoom option by cropping the 48MP sensor, which is a significant improvement over the digital zoom available on the iPhone 12. The iPhone 12's low-light performance was considered good for its time, especially with Night mode, but the ultra-wide camera struggled more in very dark conditions.
• Video Recording: Both phones are capable of recording 4K video. The iPhone 15 offers enhanced video recording features, including support for 4K Dolby Vision HDR up to 60 frames per second, compared to the iPhone 12's 4K Dolby Vision HDR up to 30 frames per second.