Google has implemented new developer verification requirements for Android app installations, effective September 30, focusing initially on Brazil, Indonesia, Singapore, and Thailand for certified devices running Android 7 or later. Apps must be linked to verified developers, and users can install apps from these developers without extra steps. However, downloading apps from unverified sources will require a new protocol called the Advanced Flow, which includes enabling settings in Developer options and a mandatory 24-hour waiting period before installation. These measures aim to enhance security against malicious software while still allowing sideloading. Google plans to expand these verification measures globally by 2027, while maintaining an open ecosystem for app distribution.