Sony Xperia XZ1 Manual page 18

1. Find and tap Settings > Network & Internet.
2. Drag the slider beside Airplane mode to the left.

Restart your Xperia™ device and then try to use the app again.

If STAMINA mode is activated, deactivate it and restart your device. To save battery
power, STAMINA mode disables some functions on your device. This may affect app
performance. For example, apps used for streaming or GPS navigation may shut down
when the screen is turned off, and email and other apps that rely on syncing may not be
updated.
To disable STAMINA mode
1. Find and tap Settings > Battery > STAMINA mode.
2. Tap the slider to disable STAMINA mode.
To restart your device
Your device may fail to restart if the battery level is low. Connect your device to a
charger and try restarting again.
3. Press and hold down the power key
4. In the menu that opens, tap Restart. The device restarts automatically.

Update the app on Google Play™ if you don't have the latest version. Not all apps can be
updated using Google Play™.

Clear the cache for the app to delete any temporary files in the app's memory that may
be causing the problem. You will not lose any personal data by clearing the cache.
To clear application cache
1. Find and tap Settings > Apps & notifications > App info.
2. Select an application or service, then tap Storage > CLEAR CACHE.
The option to clear the application cache is not available for every application or
service.

Clear all app data that has been saved by the app since you started using it. Note that all
personal data saved by the app, such as login information and settings, will be erased.
.