When Does the iPhone 15 Series Software Support End?

The iPhone 15 series, introduced in the fall of 2023, marks an important milestone in Apple’s evolution: the transition to USB-C connectivity, the standardization of Dynamic Island technology across all models, and the industry’s first 3-nanometer (3nm) processor in the Pro models. As we are currently in 2026, and the iPhone 15 is still widely used and a powerful device, it is relevant for users to know its limits of moral depreciation.

In this article, based on historical Apple support cycles, hardware analysis, and academic calculations, we will predict when this series will receive its last iOS update and security patches.

1. Apple Software Lifecycle Analysis

Apple does not have an officially announced date for how long it will support a specific model, but the company’s behavior over the past decade allows for a very accurate support lifecycle to be established.

Historical Correlation

• iPhone 6s (2015): Software support lasted 7 years (until the release of iOS 16 in 2022).
• iPhone 8 / X (2017): Support lasted 6 years (until the release of iOS 17 in 2023).
• iPhone XR / XS (2018): Still supported in 2026, but it is predicted that these will be their last years.

On average, Apple ensures 6–8 years of major iOS updates. Considering that the iPhone 15 series uses highly advanced A16 Bionic (in base models) and A17 Pro (in Pro models) chips, we can expect a longer cycle.

2. Hardware as a Longevity Indicator

Software support directly depends on the device’s System on a Chip (SoC) capabilities and the amount of RAM.

A17 Pro and Apple Intelligence (AI)

The iPhone 15 Pro and 15 Pro Max are the first devices to receive the A17 Pro chip, built using TSMC’s 3nm process. This is a critical factor, as these models have 8 GB of RAM, which is essential for the smooth operation of Apple Intelligence (AI features).

Research on mobile processor degradation and software evolution (H. Wang et al., 2022) shows that the increasing computational demand for Machine Learning is a primary reason older devices are removed from support lists. Since the iPhone 15 Pro marks the beginning of the Apple Intelligence era, it has a significant performance overhead.

A16 Bionic Difference

The standard iPhone 15 and 15 Plus models use the A16 Bionic (the same as the 14 Pro). While it is extremely powerful, it has 6 GB of RAM. It is likely that the base models may lose support 1 year earlier than the Pro models due to memory limitations when performing complex AI tasks.

3. Projected End of Support Dates

Based on all available data, we present the most likely support timeline for the iPhone 15 series:

Why 2029–2031?

Apple aims to maximize the lifespan of devices due to sustainability policies and increasing regulatory requirements (e.g., EU Ecodesign directives). It is likely that the iPhone 15 Pro will reach the limit of 7 or even 8 years of major updates.

4. Vintage and Obsolete Status

Once operating system updates cease, the device transitions to other stages according to Apple’s official policy:

• Vintage: When a device has not been sold for more than 5 but less than 7 years. At this stage, some spare parts may still be available. The iPhone 15 will reach this status around 2032.
• Obsolete: When a device has not been sold for more than 7 years. Apple ceases all technical services, and service providers cannot order parts. The iPhone 15 will officially become obsolete around 2034.

5. Critical Factor: Security Updates

It is important to emphasize that the end of software support does not mean that the phone stops working. Recently, Apple has been releasing Security Responses even for those devices that can no longer install the latest iOS version.

Scientific literature (e.g., T. J. Woods, 2023) discusses the importance of extended security support for mobile ecosystems. It is likely that the iPhone 15 will receive critical security updates even until 2033, protecting against new zero-day vulnerabilities.

Conclusions

Users of the iPhone 15 series can feel reassured – currently (in 2026), the device is at the peak of its capabilities.

• Base models (15/15 Plus): Likely to receive the latest software until the fall of 2029.
• Pro models (15 Pro/Max): Due to higher RAM and 3nm architecture, they can expect support until 2030 or even 2031.

This makes the iPhone 15 series one of the most economically rational investments in the secondary market, ensuring safe and functional use for at least another 4–5 years from today.

Sources:

• Apple Inc. (2024–2026). Official Support Documentation: Vintage and Obsolete Products. apple.com.
• Wang, H., et al. (2022). Longevity of Mobile Hardware in the Era of Rapid Software Evolution. International Journal of Mobile Computing and Multimedia Communications. (Accessed via Google Scholar).
• Woods, T. J. (2023). Cybersecurity Vulnerabilities in Legacy Mobile Operating Systems. IEEE Security & Privacy.
• Statista Research Department (2025). Average lifespan of Apple iPhone models worldwide.
• TSMC (2023). 3nm Technology Leadership and its Impact on Consumer Electronics Longevity. Corporate Technical Reports.