The latest iPhone 17 is expensive and out of reach. But my current iPhone 11 or 12 is also nearing its limit... In such cases, the "discontinued iPhone 15" often comes up as a strong contender. While boasting specs quite close to the latest generation, such as USB-C compatibility and a 48MP camera, its price is stabilizing as time has passed since its release.

On the other hand, many must have anxieties and questions like, "How many years can it be used?", "Is it okay to buy it used?", or "What's the difference from iPhone 16 or 17?". This article clearly explains the value of a discontinued iPhone 15 as of 2025, from the perspectives of support period, spec differences, market price, and key points to avoid failure when buying used.

Conclusion: Is a discontinued iPhone 15 still a good buy?

To start with the conclusion, a discontinued iPhone 15 as of 2025 is a very "viable option" for those who "don't need the latest flagship but want a device that doesn't feel cheap." The iPhone 15, released in 2023, covers all the major features expected of a current iPhone, including a USB-C port, a 48MP camera, Dynamic Island, and water/dust resistance.

While it lags behind the iPhone 16 and 17 in chip performance and AI features, its performance is more than sufficient for daily use such as social media, videos, gaming, and photography.

The big advantages of choosing a discontinued model are cost-effectiveness and a wealth of information. Since time has passed since its release, reviews, user feedback, and information about potential issues are readily available, reducing the risk of "discovering unexpected weaknesses after purchase."

Furthermore, with new prices settling down and an increase in availability of used and refurbished devices, it becomes easier to choose by "aiming for a slightly better condition" or "upgrading storage by one tier."

On the other hand, there are also disadvantages such as a "shorter software support period than the latest models" and "potential differences in some AI features like Apple Intelligence." Therefore, it's important to make a decision while organizing your own usage and priorities.

Organizing the pros and cons of choosing a discontinued model

The advantages of a discontinued iPhone 15 can be summarized as follows:

• Lower price than at launch, offering good cost-performance.
  
  

• Includes key "modern iPhone features" like USB-C and a 48MP camera.
  
  

• Abundant reviews and user feedback make information gathering easy.
  
  

• Wide range of choices for condition, storage, and color, including used and refurbished.
  
  

Conversely, the disadvantages are as follows:

• Sooner end of software support compared to iPhone 16 and 17.
  
  

• Latest AI features and some camera functions may not be as capable as newer generations.
  
  

• Lacks the "satisfaction of owning the cutting edge" compared to the latest models.
  
  

How one feels about this balance will be the deciding factor in whether to choose a discontinued iPhone 15. It is suitable for those who "don't mind if some features are older, as long as it meets their needs" and "want to keep the price down." For those who "always chase the latest and greatest features," it might be a bit underwhelming.

A discontinued iPhone 15 is perfect for these people

A discontinued iPhone 15 is particularly well-suited for people like this:

• Currently using an iPhone 11-13 and looking to upgrade soon.
  
  

• Wants to switch to a USB-C compatible model but doesn't need the top-of-the-line.
  
  

• Uses a smartphone for both work and personal life, but only moderately for gaming or video editing.
  
  

• Wants to try a used smartphone for the first time but is wary of overly old models.
  
  

• Considering having two phones, with one being "main and close to latest" and the other "sub and cost-effective."
  
  

For such individuals, the iPhone 15 is often a "just right compromise" that balances "spec reliability" with "affordability."

How long can an iPhone 15 be used? Estimated support period and lifespan

When choosing an older model, many people wonder "how many more years it can be reliably used." Apple has historically provided 5-7 years of major updates and security updates for many iPhones. As of 2025, the iPhone XS generation released in 2018 is just starting to become ineligible for the latest iOS. Considering this track record, the iPhone 15, released in 2023, is highly likely to be eligible for the latest iOS updates until at least around 2030.

Of course, whether OS support continues is not the only factor determining "lifespan." Battery and storage significantly impact actual usability. Batteries degrade gradually with repeated charging and discharging, and when their maximum capacity drops to around 80%, users often experience dissatisfaction such as "not lasting a day" or "suddenly losing charge." As for storage, as photos, videos, and apps accumulate, free space decreases, leading to slower operation and difficulty updating. When buying a discontinued iPhone 15, it's important to consider "whether the OS will last for several more years, but how are the battery and storage?"

Realistic lifespan based on battery and usage

Battery life varies greatly depending on usage, but as a guideline, a "main device used heavily every day" can often be used practically for 2-3 years, and a "sub device" for 3-4 years. When purchasing a used iPhone 15, many units have already been used for 1-2 years, so be sure to check the battery's maximum capacity at the time of purchase.

• Maximum capacity 90% or more: Almost stress-free for another 1-2 years as a main device.
  
  

• Maximum capacity 85-89%: May start to feel slightly insufficient depending on usage.
  
  

• Maximum capacity 80-84%: Consider with battery replacement or sub-device use in mind.
  
  

Some shops offer devices with new batteries installed before sale, or provide a battery warranty for a certain period after purchase. Utilizing such services can significantly alleviate concerns about "battery anxiety even with an older model."

Changing the approach to lifespan for main vs. sub devices

Even for the same iPhone 15, the approach to lifespan changes depending on whether it's "heavily used daily as a main device" or "lightly used as a sub-device." For a main device, one is more sensitive to battery degradation and slow performance, so it's safer to consider replacing it "around 3-4 years after purchase." On the other hand, if it's used as a sub-device for watching videos, children's learning, or testing, even with a slightly weaker battery, it can be used longer primarily on Wi-Fi. A two-stage operation of "main device first, then sub-device" is also one way to effectively utilize an older iPhone 15.

iPhone 15 vs. iPhone 16/17: Decide based on whether the difference matters to you

Many people probably wonder, "Wouldn't it be better to just buy an iPhone 16 or 17?" The important thing in making this decision is not to meticulously read through spec sheets, but to see "whether the difference will affect your own usage." Here, we'll roughly compare the iPhone 15 with the iPhone 16/17 and summarize the differences.

The key points are chip performance, camera, battery, and AI features. The chip has been enhanced with each generation, from the A16 in iPhone 15 to A18 in iPhone 16 and A19-class in iPhone 17, making newer generations superior for gaming and demanding tasks. However, for daily use such as social media, browsing, and video viewing, the iPhone 15 is mostly comfortable enough. The camera on the iPhone 15 already saw significant advancements, including a 48MP main camera and 2x telephoto equivalent, which is sufficient for needs like "taking beautiful photos of children or documenting travels."

How camera, battery, and AI features differ

With the iPhone 16/17, low-light photography, zoom image quality, and video stabilization have been further refined, making a noticeable difference in scenarios like "frequently taking night shots" or "heavily using zoom for sports days or stage performances." Battery life also gradually improves with each generation, which is beneficial for those who are often out and about all day or keep their screen brightness consistently high.

Regarding AI features, there's a trend where some parts of Apple Intelligence, which will be fully rolled out with iOS 26 and later, will be prioritized for models with newer chips. For those who heavily use advanced summarization, image generation, and real-time translation, the iPhone 16/17 will likely have more future potential than the iPhone 15. However, for most users, many of these features are "convenient if used occasionally," so it's worth carefully considering "whether to pay tens of thousands more just for that."

Considering the price difference and satisfaction

When comparing the same storage capacity, the iPhone 16 and 17 are generally tens of thousands of yen more expensive than the iPhone 15. How you value "slightly longer support," "slightly better camera," "slightly longer battery life," and "superiority in some AI features" for this price difference will be the deciding factor in choosing a model.

For those who say, "My smartphone is central to my life, so I'll go for the latest even if it costs a bit more," the iPhone 16/17 is suitable. However, for those who say, "Any choice will be comfortable enough if I upgrade from my old phone," or "I want to make a balanced choice within a limited budget," the discounted iPhone 15 tends to be the most realistic and balanced option.

How much does a discontinued iPhone 15 cost? New and used prices

While specific prices vary depending on the timing and availability, having a sense of the market price for a discontinued iPhone 15 can serve as a guide when comparing shops. When looking at prices, it's easier to organize by considering three routes: "new from Apple, etc.," "carrier device purchase programs," and "used shops."

New devices offer the most peace of mind, but their prices are still higher. While some configurations may be discounted or campaigns held to adjust inventory when new models are released, many people still find them "expensive for a discontinued model." Carrier device purchase programs reduce monthly payments by combining installment plans with device returns, but it's necessary to fully understand the conditions, such as "returning the device after a few years" and "remaining balance if the contract is canceled midway."

Used shops offer the advantage of lower prices compared to new or carrier devices, and a wider selection of conditions and capacities. By choosing a store that clearly specifies exterior ratings, maximum battery capacity, and warranty details, you can find a cost-effective device while minimizing risk. Flea market apps may seem even cheaper, but considering the risks of malfunctions, network restrictions, and the burden of resolving issues, they are not highly recommended for a first-time used iPhone purchase.

Click here for a list of PRODIG's used iPhone 15 series:
https://prodig-shop.com/collections/iphone-15series

Which iPhone 15 to choose? Features and how to pick between standard/Plus/Pro/Pro Max

The iPhone 15 series includes four models: "iPhone 15 (standard)", "iPhone 15 Plus", "iPhone 15 Pro", and "iPhone 15 Pro Max". Even within the same generation, sizes, camera configurations, materials, and prices differ, so it's important to choose a model that suits your usage.

The standard model is the iPhone 15. Its 6.1-inch screen offers a good balance between one-handed operation and visibility, making it easy to handle on a crowded train. It also features a 48MP main camera and 2x telephoto equivalent, providing sufficient performance for everyday photography. The price is also lower than other models in the series, making it a primary choice for those who "want to get the features of the iPhone 15 generation as cheaply as possible."

Who are Plus, Pro, and Pro Max for?

If you prioritize a large screen and long battery life, the 6.7-inch iPhone 15 Plus is a contender. It's a convenient size for people who frequently enjoy videos, games, or e-books, or who want to display text and icons larger. However, the device itself is larger and heavier, so it's more suited for people who "use it extensively with both hands" rather than those who "want to operate it easily with one hand."

For those who place even greater importance on camera and processing performance, the iPhone 15 Pro/Pro Max is suitable. The high processing power provided by the A17 Pro chip, as well as features like the telephoto camera and ProRAW shooting, are attractive to people who are serious about photography and videography, or who frequently play 3D games. However, the price is also higher, so it's a good idea to pause and consider "whether you truly need the Pro's performance."

How to decide on capacity and color

Storage capacity is basically determined by "how many photos and videos you take" and "how many apps you install." For light users, 128GB is sufficient. For those who frequently take photos and videos or want to install multiple games, 256GB or more is a good guideline to avoid regret later. While using cloud storage like iCloud is an option, it also incurs data usage and monthly fees, so the idea of "ensuring sufficient on-device storage and using the cloud as a supplement" is also a practical approach.

When choosing a color, in addition to personal preference, also consider "how noticeable scratches and dirt are" and "its compatibility with business settings" to ensure long-term satisfaction. Black and dark colors tend to hide scratches well and blend in with business attire. Bright or pastel colors allow for more individuality, but their impression can change significantly depending on the case used, so it's reassuring to visualize it before purchase.

Click here for a list of PRODIG's used iPhones:
https://prodig-shop.com/collections/iphone

Checkpoints when buying a discontinued iPhone 15 used

When purchasing a discontinued iPhone 15 used, it's crucial to prioritize "condition" as much as "price." Even for the same iPhone 15, the battery and exterior condition can vary significantly depending on the previous owner's usage. Here, we summarize the minimum points to check to avoid failure when buying used.

Especially important are the four points: condition rank, maximum battery capacity, network usage restrictions, and warranty details. By choosing a shop that clearly discloses these, you can avoid problems such as "it was scratched when it arrived," "needed battery replacement immediately," or "couldn't be used due to communication restrictions."

Condition rank and maximum battery capacity

Used shops use condition ranks to make the exterior condition easy to understand. Typical criteria are as follows:

• S Rank: New, unopened item
  
  

• A Rank: Very good condition. Very minor scratches or signs of use, but generally clean.
  
  

• B Rank: Good condition. Visible scratches and small dents from general use, but no issues with operation.
  
  

• C Rank: Fair condition. Noticeable scratches or paint peeling, but no impact on functionality.
  
  

For a balance of cost performance and appearance, aiming for A to B rank is recommended. If you're willing to compromise as a sub-device, C rank is an option, but for long-term use as a main device, it's also important that the condition feels good in your hand.

Maximum battery capacity significantly impacts usability. If it's 90% or more, even for a discontinued model, you can use it for a while without much worry about battery life. From around 85%, depending on usage, you might start needing a mobile battery in the evening. For units with capacity dropped to around 80%, even if they are cheaper, it's recommended to compare the total cost including battery replacement.

Network usage restrictions and warranty details

When choosing a used iPhone, also be aware of network usage restrictions (known as "red-ROM"). Devices that are still being paid for in installments or have unpaid bills risk having their communication stopped later. Specialized shops often confirm the device's IMEI beforehand and display its status as "○ (no problem)," "△ (caution)," or "× (restricted)." It's generally best to choose devices marked with "○."

Also, always check the warranty details. Conditions vary by shop, such as the duration for which initial defects are covered for exchange, and whether water damage or drops are excluded. If a store like PRODIG clearly publishes its inspection items and warranty details, even first-time used iPhone buyers can choose with confidence.

For existing iPhone 15 owners: When to sell and consider upgrading

For those who already own an iPhone 15, "when to sell it" and "when to upgrade to the next model" are important considerations. While iPhones retain high resale value, their market price gradually decreases with the introduction of new models and OS generations. Generally, "around the time the next generation is released" is when you can sell it at a relatively high price, and many people consider upgrading at that time.

If the maximum battery capacity is in the low 80s or storage is consistently running low, it might be more rational to "sell it while it still has value and upgrade to a newer model" rather than trying to stretch its use for several more years. Conversely, if the battery and exterior are still in good condition and there are no significant complaints, it might be better to continue using it for a while and wait for a major evolution in the next generation, rather than rushing to upgrade to the latest model.

Also, let's reconsider the benefits of upgrading. Beyond improvements in camera performance and processing speed, a longer support period and better battery life can often reduce daily stress. On the other hand, if you have no particular complaints with your current device, you might consider allocating your budget to other areas like accessories or subscriptions.

Frequently Asked Questions (FAQ)

Q. How many years can a discontinued iPhone 15 be used?

A. Based on Apple's support policy, the iPhone 15 is expected to receive the latest iOS updates until at least around 2030. Assuming no issues with battery and storage, it can realistically be used as a main device for 3-4 years, and even longer as a sub-device.

Q. Is there a point in upgrading from an iPhone 13 or 14 to an iPhone 15?

A. If you have no major complaints with your current device, there's no urgent need to upgrade. However, if you have needs like "poor battery life," "insufficient storage," "want to consolidate to USB-C," or "want better camera performance," then upgrading to a discounted iPhone 15 as a discontinued model is a realistic option.

Q. I'm nervous about buying a used iPhone for the first time. What should I be aware of?

A. Always check the condition rank, maximum battery capacity, network usage restrictions, and warranty details. Choosing a shop that clearly discloses these points can significantly reduce risks. Opting for a specialized store that publicly states its inspection system and warranty is the shortest path to a successful first used iPhone purchase.

Finally

While the iPhone 15 is a "discontinued model" compared to the latest models, it's a capable device that firmly covers what's expected of a modern smartphone, including USB-C, a 48MP camera, and water resistance. As of 2025, it still boasts specs that can be used for several years, and its price has become more affordable than at launch, making it a highly attractive option for those who "want to balance cost-effectiveness with peace of mind."

All that's left is to clarify what you expect from a smartphone and consider how you want to balance "newness," "price," and "reliability." While considering the discontinued iPhone 15, also compare it with the iPhone 14, 16, and 17, and choose the one that best suits your lifestyle. PRODIG's online store and Akihabara shop can assist you in finding that "just right device" by utilizing our inventory list and staff expertise. Enjoy the smart iPhone selection that only discontinued models can offer.