How to fix slow and laggy iPhone 15 Pro screen

The iPhone 15 Pro with A17 Pro chip and ProMotion display promises a smooth experience no matter how many apps you launch – without lags or freezes. It is a flagship model designed for demanding mobile processes. Given these lofty promises, you might feel like Apple has cheated you if your brand new device feels slow. You paid a premium price for a supposedly premium model. Understandably, hiccups are unfair.

However, before you head to your nearest Apple Store and demand a refund, take a moment to troubleshoot the error. Response problems are often due to minor misconfigurations or easily fixable glitches. With the right steps, you can determine the cause and restore functionality within minutes. Here you will find everything you should know.

Why is my iPhone 15 screen buggy?

Your iPhone may slow down if you’re running low on storage space, have background app activity turned on for all apps, are using a buggy version of iOS, or are in low power mode affecting processes. Glitches typically occur when scrolling through graphics-intensive apps (e.g. Facebook or YouTube). You may also notice some delays when tapping the device to wake it or navigating different parts of the Settings app.

How to fix lagging and frozen screen on iPhone 15 Pro

1. Close background apps

2. Free up storage space

Your iPhone cannot allocate storage space for system operations if it is already low on storage space. It launches apps and responds to commands much slower. Try deleting large, unused files (or expanding your storage plan) to efficiently resume required functions.

1. Open Settings > Generally > iPhone storage.
2. Check the list of apps and delete the ones that are taking up excessive storage space.
3. Use that Download unused apps Option to remove apps without data loss.
4. Delete old videos, photos or large attachments in messages.

NOTE

To clear your iCloud storage, go to Settings > (Your Apple ID) > iCloud.

3. Delete heavy processes

Resource-intensive apps such as video games or media editors put a lot of strain on the CPU and GPU, even in the background. Even poorly optimized apps may require excessive power cycles. All of these processes prevent your iPhone from responding smoothly to touch input. Close it (or delete it if possible) while troubleshooting.

1. Go to Settings > battery.
2. Check those Battery consumption by app List to identify apps that consume the most resources.
3. Close or uninstall these apps using the app switcher if they are not needed.

4. Turn off VPN

Yes, VPNs redirect network traffic and encrypt data. However, they also introduce latency in both Internet-dependent tasks and system-level background operations. Additional processing can slow responsiveness to app and touch inputs. Check whether turning it off restores system functionality.

1. Open Settings > VPN and device management.
2. Tap the active one VPN profile and turn it off.

5. Disable power saving mode

Power Saving Mode intentionally reduces performance to conserve battery power, limiting CPU and GPU performance. It lowers the refresh rate and limits background activity. Although it is power efficient, it can affect touch responsiveness and smooth screen.

1. Open Settings > battery.
2. Turn off Energy saving mode.

6. Update iOS

You may be using an outdated version of iOS 18. If lag is a known issue on certain iPhone models, Apple will release (or has already released) the required patch update. Install the latest stable iOS version available in your region.

1. Go to Settings > Generally > Software update.
2. Knock Download and install whether an update is available.
3. After the update, restart your iPhone to apply the changes.

7. Let your iPhone rest

At this point, you’ve probably already spent a few minutes troubleshooting. It is advisable to let the device cool down first. Prolonged use may increase internal temperature and trigger thermal throttling to protect hardware.

1. Press and hold the button Side button and either Volume buttonN
2. Slide to turn off.
3. Wait at least 15 to 20 minutes before turning the device back on.

8. Factory reset

Unfortunately, the last resort is a factory reset. This is a drastic way to fix hidden misconfigurations or errors that are draining your iPhone’s resources. Remember to back up your device beforehand.

1. Go to Settings > Generally > Transfer or reset iPhone.
2. Choose Delete all content and settings.
3. Enter yours Passcode And Apple ID password to confirm.
4. After resetting, restore your iCloud account.

If problems persist, contact Apple Support. If your iPhone is still under warranty, you won’t have to pay for manufacturing defects.