Vivo

System restrictions on Vivo phones have not been fully uncovered yet. If you have any additional information, please let us know.

The apps loading from the background need a special permission for Autostart.

Based on the information by Vivo, this option should be present on all Vivo phones.

Newer OS version: Settings > More settings > Applications > Autostart to turn on/off the app switch.

For Funtouch OS 2.6 and lower version: i Manager > App manager > Autostart manager to turn on/off the app switch.

Apps locked in the taskbar are safe from getting terminated when they run on the background.

1. Swipe up in your home screen while the app is open in background, and swipe the app icon down.

2. Tap the lock icon.

3. Done - now the app is locked in the taskbar.

1. Swipe up the app down while it is open in the background.

2. Tap on the lock icon that appears.

3. App is locked.

1. Go to system Settings > Battery.

2. Go to High background power consumption.

3. Find your app in the list and enable the high battery consumption.

1. Open Battery section.

2. Go to High background power consuption.

3. Enable for your app.

Source: dontkillmyapp