The quick version
- Software support end dates set the outer limit, and newer flagship phones now promise up to seven years.
- Check Maximum Capacity in your battery settings. Around 80 percent is the point where many people start to notice real trouble.
- Free storage and a fresh battery often make an older phone feel new again.
- Replace when security updates end, when repairs cost more than the phone is worth to you, or when the phone can no longer do what you need.
Think about the last time your phone slowed to a crawl right before you needed it most. Was it the battery, the storage, or the software? Usually it's a mix, and that's the real answer to how long phones last. The honest short version: for most people a phone stays comfortable for roughly three to six years. That range is my own estimate based on how support windows and battery wear tend to line up, not a number from a study.
The good news is that you can check the three things that decide it in about ten minutes. Here's how each one works, and a simple checklist to help you decide whether to keep or replace.
Software support sets the outer limit
Once a manufacturer stops sending updates, your phone starts aging faster in a way you can't see. Security patches stop, new apps eventually drop support for old systems, and you're left hoping nothing nasty shows up. So the first question to ask is when the updates end.
The picture has changed a lot in the last couple of years. Google's Pixel 8 and newer phones are promised seven years of OS and security updates counted from their first U.S. availability, while the Pixel 6 and 7 families get five years. For example, the Pixel 8 and Pixel 8 Pro are supported until October 2030, and the Pixel 9 series runs until August 2031 according to Google's own software update help page.
Samsung has moved in a similar direction, though the details vary a lot by model. Its flagship Galaxy S24 and newer phones, along with recent foldables, get seven years of OS and security updates. Many mid-range A series phones get fewer years, and older models often fall back to four OS upgrades and five years of security patches. Samsung describes the seven-year figure as an upper limit for eligible devices, so check your exact model rather than assuming. You can look under Settings, then Software update, on a Galaxy phone to see what's available, and this SamMobile guide on Android update support walks through the model tiers.
Apple doesn't publish its support windows in the same format, but iPhones have historically received major iOS updates for many years. If you're an iPhone owner, the practical habit is the same: check whether your model still appears in the latest iOS update list, and treat the loss of that list as your warning sign.
Battery wear is the part you can measure
Every lithium-ion battery slowly loses capacity with use. That's normal chemistry, not a defect. What matters is how far it has dropped, and on an iPhone you can see that number directly. Open Settings, tap Battery, then Battery Health & Charging, and read the Maximum Capacity figure. It compares how much charge the battery holds now with how much it held when new.
Apple's benchmark is 80 percent. Above that, most people don't notice much day to day. Below it, the phone may run out sooner, and iOS can slow the processor to avoid sudden shutdowns when the battery struggles to deliver peak power. Published cycle targets have changed over the years, and sources don't fully agree on the older numbers. One repair guide says iPhone 14 and earlier were rated for 80 percent at 500 full cycles, and iPhone 15 and later at 1,000, so check Apple's current support pages if you want the exact figures for your model.
If you want to understand why this happens and what slows it down, our article on why your phone battery gets worse every year covers the chemistry and the everyday habits that help.
One easy habit is a charge limit. On recent iPhones you can set a limit between 80 and 100 percent in Settings, under Battery and then Charging. Keeping the battery from sitting at full charge for long stretches can slow wear, though it also turns off Optimized Battery Charging, so weigh the trade off for your routine.
Storage and speed: the slow leak
A phone with almost no free storage can feel sluggish, and it can struggle to download and install updates. That matters, because a phone that can't take updates is losing its support window in practice, even if the manufacturer still offers them.
Photos and videos are usually the biggest culprits. Start by checking your storage breakdown in Settings, then move older photos and videos to cloud storage or a computer. Clear out apps you haven't opened in months, and look at large downloads you forgot about, like offline maps or old podcast episodes.
Here's a quick test. Free up space, restart the phone, and see how it feels after a day. If it's still slow, the cause is more likely a worn battery or an aging operating system than storage. That's useful information, because it tells you which fix is worth paying for.
Repairs: when fixing beats replacing
Many phones die from something cheap to fix. A battery swap, a new screen or a charging port can bring back a phone that works well in every other way. The catch is cost, which varies by model, region and shop, so get a written quote before you decide.
Parts availability matters too. Google says it will make hardware parts available for seven years on Pixel 8 and Pixel 8 Pro to match its software promise, which is a good sign for long term repairs. If you own a phone whose maker has stopped selling parts, a repair may still be possible at an independent shop, but options narrow over time.
Warranty and insurance can change the math. Some repair guides note that AppleCare+ can cover a battery replacement once health drops to 80 percent or below, so check your coverage before paying out of pocket. For repairs, a reputable repair technician or the manufacturer's own service is the safest route, and it's worth asking what parts they use.
A simple checklist for keep or replace
When you're stuck, run through these questions in order. You don't need a spreadsheet, just honest answers.
- Are security updates still coming? If the end date is less than a year away, start planning a replacement. If it's already passed, replace soon, or only use the phone for low risk tasks.
- What is the battery health? At 80 percent or higher, keep the phone unless something else is wrong. Below that, and especially if you see unexpected shutdowns, a battery swap is often the best value.
- Does the phone still run your must have apps? If your banking app, maps or messaging app is dropping support, that's a practical reason to move on.
- Is storage the only problem? Clear space first. If the phone feels fast again, you're done.
- Would a repair cost less than replacing? Compare a written repair quote with the price of a used or refurbished phone with a longer support window.
- Does it still do the jobs you care about? Camera, video calls, navigation and note taking should feel good enough. If they're frustrating every day, your phone has finished its job for you.
If you answered yes to keep on most of these, your phone still has life in it. If two or more point to replacement, you'll likely be happier with a new device.
Start here: what to do first
Today, do two quick checks. Look up your phone's update end date on the manufacturer's site, and open your battery health screen to read the maximum capacity. Those two numbers will tell you more than any marketing claim.
Then free up some storage and restart the phone. If it still feels slow after a day, get a repair quote before you shop. A qualified technician can confirm whether the battery is the real problem, which is a sensible step before you spend on something new.
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Quick answers
How long do phones last on average?
Most people find a phone comfortable for roughly three to six years, but this is a practical estimate rather than a study result. The real limit depends on how long the maker keeps sending security updates and how healthy the battery stays.
How long do Google Pixel phones get updates?
Pixel 8 and newer phones are promised seven years of OS and security updates from their first U.S. availability. Older models such as the Pixel 6 and 7 families are covered for five years, so check your exact model's end date.
When should I replace my iPhone battery?
Many people consider a replacement when Maximum Capacity in Battery Health falls to around 80 percent or below. Replace sooner if you see unexpected shutdowns or the phone slows down noticeably.
Does a full phone storage make it slower?
A nearly full storage can make a phone feel sluggish and can cause trouble installing updates. Clearing photos, videos and unused apps is a quick test, and if the phone still feels slow afterward, the battery or software age is more likely the cause.
