Third party apps

[Lufkin1]

How do I allow installation from third party sites and apps xperia 10 

[Martin1]

Hi @Lufkin, Let me see if I can be of any help here! 

In order to install a non-Google Play app, please follow the steps below.

1. Find and tap Settings > Apps & notifications > Advanced > Special access > Install unknown apps.
2. Tap the application you want to use to install apps from other sources.
3. Tap the switch beside Allow from this source to turn it on.

Let me know if that helps!