How long do phones last and when should you upgrade?

Before buying a new mobile phone, you may ask yourself: How long do phones last? Would you rather upgrade your phone for newer technology and security features, or wait until your phone shows signs of slowing down?

Most smartphones remain useful for three to five years, though proper care and ongoing software support might extend their useful lives. If you’re deciding when to replace your device, keep in mind that:

• Most phones remain useful for three to five years, though this can vary by manufacturer, model, and support.
• Declining battery performance may be the first sign of aging and may result in more frequent charging or noticeable heat.
• Existing phones may receive new software and features, while some features require newer hardware.
• Persistent performance problems, costly repairs, or expired security support may signal that it’s time to upgrade.

Daily use, wear and tear, and the demands that apps put on your device affect how long your phone may last.

How long does the average phone last?

Many smartphones remain useful for three to five years, though no single standard defines their lifespan. Studies often measure how long consumers keep their phones rather than how long the devices remain functional. One study found that Americans kept premium smartphones for an average of 42 months, up from 38 to 40 months in prior years.¹

An older phone may still power on, but aging hardware and outdated software can limit security, app access, and reliability. Battery wear, physical damage, and software support also shape its useful life.

Three to five years is a reasonable estimate, but design and repair access can shorten or extend that range.

Types of phones and how long they last

Different types of phones require different care. Slab phones have rigid screens and no central hinge. Cases and screen protectors can reduce damage from drops, while limiting heat and moisture helps prevent long-term wear.

Foldable phones use flexible, layered screens and mechanical hinges. Flip-style models fold into a smaller shape, while book-style models open to provide more screen space. Objects caught between the screens can damage the display when the phone closes. Pressure on the crease may also harm the screen.

On rated models, water resistance offers limited protection from splashes or brief submersion. Wear, heat, impacts, and repairs can weaken protective seals.

Each design has vulnerable parts, so follow the manufacturer’s care instructions.

Device protection and repair options for today’s phones

Device protection can lower eligible repair or replacement costs after accidental damage. Coverage, service fees, claim limits, and enrollment periods vary by plan. Review the terms before enrolling.

Repair may cost less than replacement, depending on the phone’s age and damage. Without protection or warranty coverage, you generally pay the full repair cost.

Consult the manufacturer, an authorized provider, or a qualified independent repair shop before approving repairs. Review the warranty, request an estimate, and confirm which parts the shop plans to use. Poor repair work can cause further damage.

A protection plan or qualified repair may keep a damaged phone in service, but the value of either option depends on the phone’s age, repair cost, and remaining software support.

Most smartphones last three to five years. Design, battery condition, software support, and repair costs determine where a device falls within that range.

Evaluate the device by considering the main factors that determine a phone’s lifespan.

What actually determines a phone’s lifespan?

The build quality of the device you purchase plays a significant role in its lifespan. If longevity is a priority, compare durability, repairability, battery-service options, and software-support periods. Accidental damage, battery wear, and the end of software support may eventually make repair or replacement necessary.

Build quality and durability

Not all phones are equal, and that includes build quality and durability. If you frequently drop your phone or work in a demanding environment, such as a construction site, you may want to consider a rugged phone designed for more demanding conditions.

Don’t treat any phone as waterproof, even if it carries a water-resistance rating. Rated phones, however, may use seals to reduce the risk of water entering internal components.

A case and screen protector can lower the risk of damage and may extend the phone’s life.

Software update support

A software-support period is the length of time a manufacturer plans to provide OS updates and security patches. These may include annual platform upgrades, interface changes, and new features that impact your user experience.

This support also includes security patches, which help address security vulnerabilities and help protect your device and data from hackers. Updates may also fix bugs and improve performance.

Your phone may let you install updates automatically or manually. For better security, the Cybersecurity and Infrastructure Security Agency (CISA) recommends installing updates promptly.² Prompt updates can help extend your phone’s useful life.

A phone still works after support ends, but security risks rise over time. Apps may also require a newer OS. Review the manufacturer’s support period and start date before buying. An older discounted model may have fewer updates remaining.

Daily usage habits

Gaming, navigation, video recording, and hotspot use drain the battery and generate heat. Background apps can also consume power, data, and processing resources.

Remove unused apps and restrict unneeded background activity. Skip rigid charging schedules and focus on limiting heat. Limiting heat and unnecessary background activity may reduce battery use and slow battery aging.

Physical protection, continued software updates, and moderate use may keep your phone working for several years. Declining battery life or persistent performance problems may indicate a need for troubleshooting, repair, or replacement.

[Read: How to replace a broken phone]

Battery health: the biggest factor in longevity

Phone batteries lose capacity over time, especially when exposed to heat. When a phone reports maximum battery capacity, the percentage estimates how much energy the battery can hold compared with when it was new.

Check your phone’s settings or built-in diagnostics for battery information. If the phone needs frequent charging, shuts down unexpectedly, or displays a service warning, the battery may need replacement.

Replacing a worn battery may extend the life of an otherwise functional phone.

Simple ways to extend your phone’s life

You can’t stop battery degradation, but you may be able to slow wear and prevent avoidable damage. Focus on simple habits that don’t make the phone difficult to use.

• Control heat. Don’t leave your phone in a hot car or direct sunlight. Pause demanding tasks if the device becomes unusually warm.
• Use compatible chargers. Choose reputable cables, power adapters, and wireless chargers that meet the manufacturer’s specifications.
• Enable optimized charging. Many phones can adjust or limit charging based on your schedule and battery settings.
• Install updates. Software updates can improve mobile security, compatibility, reliability, and power management.
• Protect the phone. A well-fitting case and screen protector can reduce damage from drops and scratches.
• Manage storage. Remove unwanted downloads, duplicate photos, and unused apps before the storage becomes completely full.
• Address damage early. Damage to a charging port or screen can worsen or cause additional problems.

Good care may help you reach or exceed the average phone lifespan, but it can’t restore expired software support or solve every hardware problem. Persistent issues may indicate that repair is no longer practical.

Signs it might be time for a new phone

Consider replacement when your device can no longer complete essential tasks reliably or securely or when repairs no longer make financial sense.

Common warning signs include:

• The battery charge doesn’t last as long
• Your phone shuts down or becomes unusually hot during basic use
• The manufacturer no longer provides security updates
• Essential apps don’t support the phone’s operating system (OS)
• The screen, charging port, or another component requires an expensive repair or one not covered by a protection plan
• Storage remains full after you remove unused apps and files, despite storing files in a personal cloud
• The phone lacks a network or accessibility feature you need

Before upgrading, complete these final checks:

• Restart the device
• Install available updates
• Back up files, then remove local copies you no longer need
• Remove unnecessary apps
• Check available storage
• Review battery health

Replacing a worn battery or damaged screen may resolve the issue if the phone still has adequate software support.

Replacement may make more sense when repair costs approach the phone’s current value. It may also be practical when several problems occur together, such as poor battery life, limited storage, and expired security support.

A single slow app doesn’t mean your phone has reached the end of its life. Repeated problems after troubleshooting provide a stronger reason to upgrade.

[Read: When should I get a new phone?]

Choosing your next phone for maximum lifespan

If you decide to replace your phone, look beyond its processor, camera, and launch price. Software support, repair costs, storage, and durability can reveal more about how long the next device will remain useful.

Compare these factors:

• Length and scope of OS and security-update support
• Battery replacement availability and cost
• Screen and charging-port repair costs
• Water- and dust-resistance ratings
• Storage capacity for future apps, photos, and updates
• Availability of protective cases and replacement parts

The lowest-priced device isn’t always the least expensive over time. Limited storage, a short software-support period, or high repair costs may lead to an earlier replacement.

As you consider the question “How long do phones last?” think of three to five years as a useful guideline, not a deadline. When it’s time for an upgrade, browse our phones for the latest models with the advanced features you want.

And you can upgrade on your timeline when you add AT&T Next Up Anytime® to your AT&T installment plan. You can get up to three upgrades in a 12-month period.^*

Visit att.com to compare phones and wireless plans, review upgrade options, and shop for accessories that can help protect your device.

Also, make sure you protect your phone with AT&T Protect Advantage® to repair or replace your device as soon as the same day if it’s ever cracked, dropped, or broken.

Connecting changes everything, and we’re here to help keep you connected.

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¹Jagmeet Singh, “Should you still buy your next smartphone — or subscribe to it instead?”, TechCrunch, August 1, 2026, https://techcrunch.com/2026/08/01/should-you-still-buy-your-next-smartphone-or-subscribe-to-it-instead/.

² Davey Winder, “CISA Warns iPhone And Android Users — Secure Your Smartphone Now,” Forbes, November 28, 2025, https://www.forbes.com/sites/daveywinder/2025/11/28/cisa-warns-iphone-and-android-users---secure-your-smartphone-now/.

^*Req. purchase of eligible smartphone on AT&T Installment Plan^SM with extra $10/mo. Next Up Anytime feature, qualified credit and elig. svc. Upgrade elig. with qualified turn-in. Max. 3 upgrades in a 12-month period. Limits and restrictions apply.