Your phone buzzes with a familiar prompt: a software update is ready to install. Should you tap install now, or leave it for later to dodge the bugs that sometimes ship with a fresh release? The honest answer is that the update you should install tonight and the one that can safely wait are two very different things.
Security patches and version updates are not the same thing
The same notification can hide two very different things. Security patches are small, lightweight updates that close newly discovered holes in the system without changing how your phone looks or works. Version updates are the bigger ones: they add features, sometimes redesign the interface and ask more of your hardware.
Telling them apart takes a few seconds. On an iPhone, go to Settings > General > Software Update. On Android, open Settings > System > Software update, or Settings > About phone, where the Android version and the security patch date are listed separately.
Good to know: on Android, if the security patch date moves forward while the Android version number stays the same, you are looking at a patch, not a new system.
Install tonight, or leave for later?
Once you know which kind of update you are dealing with, the decision almost makes itself. As a rule of thumb, anything that fixes security goes on straight away, while anything that reshapes the phone can wait until the dust settles.
Install without waiting:
- Security patches, which close a hole attackers already know about the moment it goes public.
- Small updates that leave the interface untouched, so there is little to relearn and little to go wrong.
- Anything the manufacturer flags as critical or emergency, whatever your phone's age.
Fine to leave for a few days:
- A major version update on an older handset, so the first bugs get ironed out before you install.
- A big feature release in its opening days, while you read what early adopters are reporting.
- Just never let "a few days" quietly become "never": an update you keep postponing is one you will forget.
Why a security patch should never wait
The moment a patch is released, the flaw it fixes becomes public knowledge, and anyone looking to exploit it knows exactly where to aim. The gap between a patch going out and you installing it is the exact window in which your phone stays exposed.
Every day you put it off leaves a known door open on a device that holds your banking apps, your messages and your saved passwords. In the days after a fix goes public, attempts to exploit that particular weakness tend to rise rather than fall.
Older phones: how long is it worth updating?
On a handset that is five or six years old, the worry about slowing it down is understandable: a newer system asks for more memory and processing power, and performance can dip. Waiting a few days for the first feedback and follow-up fixes is fair enough, as long as a few days does not quietly become never.
A phone that no longer receives updates at all is a far bigger problem than a bit of lag, because the holes simply stay open. Since April 2024, the Product Security and Telecommunications Infrastructure Act has required manufacturers to tell UK buyers how long a device will keep getting security updates, so it is worth checking how long each manufacturer supports its phones before you buy.
If your phone has already dropped out of support, the smarter move is often to compare the latest phone deals and replace it, rather than keep a device that no longer gets patches.
How to install an update without the hassle
A big update goes more smoothly with a little preparation. Run through this before you tap install:
- Back up your data first, to iCloud, Google or a computer.
- Connect to a stable Wi-Fi network before you start the download.
- Charge the battery to at least 75% on Android, or simply plug the phone in.
- Free up some storage, as the file has to be unpacked and installed.
- Turn off battery saver mode, which pauses downloads running in the background.
- Switch on automatic updates for security patches, so you never have to think about them.
If the download crawls or stalls, the culprit is usually the connection rather than the phone itself, so it is worth trying again on a faster network.
Beware fake update alerts
A genuine update only ever comes from your system settings or an official app store. If you get a text message, a browser pop-up or a link urging you to install an update right away, it is almost always a phishing attempt, the same trick as those fake parcel delivery texts.
When in doubt, ignore the message, open your settings yourself and check for updates directly from your phone. If there really is one waiting, it will be there.