The main reason is that even though you have installed the new iOS, there still are some background tasks your iPhone needs to perform. Limited available storage space. After updating iOS, your iPhone storage may be full. Correspondingly, iPhone starts to slow down after the update.
There could be several reasons why iPhone laggy issue happens after downloading and installing iOS 16 updates. The most common reasons are: Your phone capacity is too low to carry iOS 16 beta. Too many open apps.
If your iPhone's storage space is running out or there is little storage space available after installing the new iOS 16, your iPhone 11 would slow down or show signs of decline in performance. It's suggested that you should delete unnecessary apps and app caches before updating your iPhone 11 to iOS 16.
The Bottom Line. Apple's iOS 16 is a superb enhancement of the iPhone operating system with deep Lock Screen customization options, significant Live Text improvements, and support for physical security keys.
iOS 16 brings a redesigned Lock Screen with new ways to customise and widgets for information at a glance. Link your Lock Screen to a Focus and use Focus filters to filter out distracting content in apps. Big updates to Messages let you edit or unsend a message you just sent.
Make sure you have enough storage
You can check your device's storage in Settings > General > [Device] Storage. For best performance, try to maintain at least 1GB of free space. If your available storage is consistently less than 1GB, your device might slow down as iOS or iPadOS repeatedly makes room for more content.
Here are some of the most common reasons why your iPhone is slow: Bloatware and other junk files are clogging up storage space. You're running an outdated version of iOS. You have a poor network connection or weak Wi-Fi signal.
iOS 16 downloading time takes about 10-40 minutes.
If you're updating to iOS 16.4. 1, this can take 7 minutes to an hour, depending on the same factors. If you're using a ridiculously slow Internet connection (like something slower than 1mbps), you could be looking at a 30min+ download time.
Apple iOS 15.6.1 Verdict: Upgrade
At this stage, iOS 15 has proved itself to be consistently reliable, and iOS 15.6. 1 looks set to follow this trend. Yes, isolated problems remain, but no software is ever bug-free. My advice is to upgrade as soon as possible.
Display may appear completely black during device setup. Copy and paste between apps may cause a permission prompt to appear more than expected. VoiceOver may be unavailable after rebooting. Addresses an issue where touch input was unresponsive on some iPhone X, iPhone XR, and iPhone 11 displays after being serviced.
An unusual battery drain issue is one of the worst things to occur with your iPhone after iOS 16 install. This issue can persist even with the latest software update. It's been hardly a month since iOS 16 has been released officially, yet there are reports of many battery drain issues from the general public.
When batteries chemically age. All rechargeable batteries are consumable components that become less effective as they chemically age. As lithium-ion batteries chemically age, the amount of charge they can hold diminishes, resulting in shorter amounts of time before a device needs to be recharged.
The iOS 16 may have a bug that makes iPhone overheat. In addition, apps that have not been optimized to work with iOS 16 will make the iPhone be hot. Using several high-powered apps at the same time can also cause iOS 16 overheating issues.
It's especially important to avoid exposing your device to ambient temperatures higher than 35° C (95° F), which can permanently damage battery capacity. That is, your battery won't power your device as long on a given charge. Charging the device in high ambient temperatures can damage it further.
A large number of users who had recently upgraded to iOS 16 have complained that their iPhone has significantly slowed down after the software update. The unexpected sluggishness has hurt the overall performance of the device.
Is Your iPhone or iPad Compatible? With iOS 16, Apple is ending software support for the following devices: the iPhone 6S, iPhone 6S Plus, iPhone SE 2016, iPhone 7, and iPhone 7 Plus. Basically, if you have an iPhone 8 (2017) or newer (including the second- and third-gen iPhone SE), you can download and run iOS 16.
In the end, it's up to you which update to choose, but iOS 16.1 will offer more robust security protection than iOS 15.7. 1, making it the obvious choice for anyone who is concerned abouts security or might be a target.
You might be unable to update your iPhone or iPad wirelessly — or over the air — for one of these reasons: Your device doesn't support the latest software. There isn't enough available storage space on your device. The update takes a long time to download.
While some iPhone users should install the software right now, others might want to wait before moving up from iOS 15 or older versions of iOS 16. iOS 16.6 is Apple's latest iOS 16 upgrade and it's available to download right now if you own an iPhone 8 or newer, all the way up to the iPhone 14 series.
If you plan to go straight to iOS 16, you don't need to download iOS 15.7 first. The bug fixes mentioned within the release notes are all contained within iOS 16 too. You can just hit the Upgrade to iOS 16 option that sits below iOS 15.7.