How long should a phone last? Plus the signs it is time to upgrade

A good smartphone should last between four and six years of everyday use, and often longer if you look after it. The hardware rarely gives up first. What usually pushes people to upgrade is a tired battery, slowing performance, or the day software updates stop arriving.

The gap between how long a phone can last and how long most people keep one is wide. Plenty of handsets get replaced at the two or three year mark while they are still perfectly capable. Knowing what limits a phone's life helps you decide whether to hold on or move on.

How long iPhones and Android phones are built to last

The biggest factor in a phone's usable life is software support, because that determines how long it keeps getting security patches and works with the latest apps.

Apple has a strong record here. iPhones typically receive around six to seven years of iOS updates, so a phone bought today should keep getting fixes well into the early 2030s. That long support window is one reason iPhones tend to hold their value, which our guide to whether iPhones hold their value covers in more detail.

Android support varies a lot by maker. Recent flagship handsets from Samsung and Google now promise up to seven years of operating system and security updates, bringing them in line with Apple. Many mid-range and budget Android phones get far less, sometimes only two or three years, so the badge on the back matters when you are guessing how long a device will stay current. These are general estimates rather than guarantees: makers occasionally change their policies, and the exact end date depends on the model and when it launched.

What actually limits a phone's lifespan

Assuming software keeps flowing, the next limit is usually the battery. Phone batteries are typically good for roughly two to three years, or about 500 to 800 charge cycles, before you notice a real drop in how long they last on a charge. After that the battery still works, it just needs charging more often.

The good news is that a battery is the one part designed to be replaced. A fresh one can give an older phone a second life for a fraction of the cost of a new handset. Battery health also affects what your phone is worth when you sell, which we break down in our guide to iPhone battery health and resale value.

Beyond the battery, the screen and ports are most likely to wear or break, as drops, water, and years of charging take a toll. None of this is inevitable: careful use plus a case and screen protector can keep a phone running well past the point most people give up on theirs.

Signs it is time to upgrade

A phone can physically keep going for years, but there comes a point where the hassle outweighs the savings. Look out for these signs.

• The battery no longer lasts a day. If you are reaching for a charger by lunchtime or carrying a power bank everywhere, the battery has worn down. A replacement may fix it, but on an older phone it is often the nudge to upgrade.
• Everything feels slow. Apps take longer to open, the keyboard lags, and switching between tasks stutters as newer software asks more of older hardware.
• Software and security updates have stopped. Once a phone drops off the update list, it stops getting security fixes. That is the most important reason to move on, because an unpatched phone is a genuine risk for banking and personal data.
• The screen is cracked or parts are failing. A broken screen, a dodgy charging port, or a camera that no longer focuses all chip away at daily use. Weigh the repair cost against the price of a replacement.
• Apps are dropping support. When your banking app or a service you rely on stops working on your version of the operating system, the phone has effectively aged out.

If two or more of these ring true, it is probably time. For a closer look at timing, see our guide on when to sell your iPhone.

Why selling beats leaving it in a drawer

A phone loses value the longer it sits unused. Newer models launch, prices for older handsets drift down, and the battery keeps ageing even when the phone is switched off. The drawer is the worst place for it.

If you are upgrading anyway, selling the old phone while it still holds value almost always beats holding on to it. The difference between selling now and selling in a year can be meaningful, especially for recent iPhones and flagship Android handsets that still command a strong price today. Selling also puts money towards your new phone and gets a working device back into use rather than into landfill. You can check what your phone is worth in a couple of minutes before you decide.

Common questions

Is it worth replacing the battery instead of upgrading?

Often, yes. If your phone is otherwise running well and still getting software updates, a new battery is far cheaper than a new handset and can add a year or two of use. Once updates have stopped, a fresh battery only delays the inevitable.

How many years of updates will my phone get?

For iPhones, expect around six to seven years from launch. For Android, recent flagships from Samsung and Google now offer up to seven years, while many mid-range and budget models get noticeably less. Check the maker's support page for your exact model.

Does using a phone past its support date matter?

It does. Once security updates stop, known vulnerabilities go unpatched, which is a real concern for anything involving banking or personal information. The phone may still work fine, but it is no longer safe as your main device.

My phone still works. Should I sell it now or wait?

If you have already moved to a new phone, sooner is better. The value only falls over time, so a working phone you are not using is quietly losing money in a drawer.

Sell your phone with Cash My Tech

Cash My Tech is a UK postal buyback service. There is no walk-in shop: you get an instant quote online, and if you accept it, the price is locked for five days while you prepare your device. A free prepaid postage label comes with your booking. Send the phone in, and once it is inspected before 2pm on a working day, payment arrives the same day by UK bank transfer.

Every device goes through a certified data wipe in line with UK GDPR and the WEEE Regulations 2013. Cash My Tech buys iPhones, Samsung Galaxy, and Google Pixel devices in any condition, including cracked screens and faulty handsets. The service is rated 4.8 out of 5 from over 1,250 verified UK reviews.

Ready to upgrade? You can sell your iPhone or get a quote for any phone in a couple of minutes. All figures here are estimates, and your final offer depends on the model and its condition.