Why is my device running slow after a software update?

Valid for

• Android™ 9.0
• Android 10

Information / Solution

If you experience that the device runs very slow after a software update when, for example, entering menus or opening applications, read on to get suggestions on how to solve the problem. Verify after each suggestion whether the problem was solved, before trying the next one.

Wait for two days to see if the performance improves

When you have performed an Android system update, it may take up to two days for the device software to stabilize. Some processes initiated by the update will continue running in the background for some time, for example:

• The indexing of files.
• The updating of pre-installed apps. The apps are updated when the device is turned on and connected to the internet for the first time after the update.

The processes running in the background are using the processor resources, so the device may appear to be slow for a day or two. This behavior is normal during indexing and app updates.

Restart the device

If the device is still slow two days after the update, restart the device to see if the performance improves.

Perform a factory data reset

Back up any important data saved on the internal memory of your device, and then perform a factory data reset. You find detailed instructions on how to reset your device further down this page.

Perform a software repair

If you haven't done so very recently, back up any important data saved on the internal memory of your device, and then perform a software repair. You find instructions on how to do a software repair further down this page.

Format your memory card (SD card)

Try formatting the memory card. Formatting the card removes all files and folders including any leftover data and corrupted files. You find detailed instructions on how to format the memory card further down this page.

Detailed instructions

Perform a factory data reset

1. Back up any important data that is saved on the internal memory of your device to, for example, an SD card or to a cloud backup service (online account). If you have any encrypted files stored on an SD card, you should also remove the encryption to ensure you can still access them after the reset.
2. Find and tap Settings → System → Advanced → Reset options → Erase all data (factory reset) → RESET PHONE.
3. If required, draw your screen unlock pattern or enter your screen unlock password or PIN to continue.
4. To confirm, tap ERASE EVERYTHING.

Perform a software repair

1. Make sure you know your Google account username and password. Depending on your Xperia device's security settings, you may need to enter them in order to start up your Xperia device after a software repair. Tip: If you don't remember your Google account username or password, you can try to recover them using the Google Account Recovery page at https://www.google.com/accounts/recovery/.
2. Computer: If not already installed, download and install the Xperia Companion application from https://support.sonymobile.com/xperia-companion/.
3. Open the Xperia Companion application.
4. Under Manage your Xperia, click Software repair.
5. Follow the on-screen instructions.

Format the memory card

1. Find and tap Settings → Storage.
2. Tap SD card → the menu icon (three vertical dots), then tap Storage settings → Format → FORMAT SD CARD.