Скачать или смотреть Fixing Third‑Party Launcher Restrictions on OPPO Devices (No ADB, No Root)

Many OPPO/ColorOS devices (like the Reno 3 Young) restrict users from setting third‑party launchers (e.g. Nova & Niagara) as the default.

The workaround below uses a hidden Google test app that helps unlock the launcher picker.

The Issue

On OPPO phones, the default launcher picker is hidden or restricted.

This means you cannot set Nova Launcher (or others) as the permanent default, even if installed.
Normally, fixing this requires ADB commands or root access, but there’s a simpler method.

The Solution:

Using CrossProfileTestApp.apk

What is it?

The app is part of Android CTS Verifier (Compatibility Test Suite Verifier), a tool Google provides for device manufacturers to test compliance with Android standards.

CrossProfileTestApp.apk specifically tests profile switching (multiple users, work profiles, etc.).

By design, it exposes system-level activities like launcher selection, intent filters, and app visibility.

This "exposure" bypasses OPPO’s restrictions and makes the hidden Default Home App selection visible again.

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