After Huawei updated HarmonyOS, many Huawei users upgraded to HarmonyOS, but they could not download and install third-party applications after the upgrade.
Perform the following steps to install apps outside the Huawei application market
1. First, we open Huawei mobile phone Settings, and then we slide down to find [System and Update] Settings.
2, then we click [Pure mode] and exit.
method
1. First, turn on your Huawei mobile phone and click \"Security and Privacy\" in the phone Settings.
2, then in the pop-up window, click to open \"More security Settings\".
3, then in the pop-up window, click to open the switch behind \"unknown source application download\".