The 24-hour wait is real, and it has started landing on phones. Google has begun rolling out Android’s “advanced” sideloading flow — the process you will have to complete before you can install an app from a developer who has not verified their identity with Google. It arrives about six weeks before developer verification enforcement begins in its first four countries.
How the Android advanced sideloading flow works
The flow is not a switch you flip in the moment. It is a delay you have to plan around, and the steps run in this order:
- Open Developer options and turn on Allow apps from unverified developers. Developer options itself has to be unlocked first, which is a step most people have never taken.
- Read through the warning screens Android shows before it will accept the choice.
- Wait out a one-time 24-hour period. Nothing installs during it.
- Return to that same page after the day is up to complete the process.
- Choose whether the permission stays on temporarily, for seven days, or indefinitely.
Two details matter for anyone who actually sideloads. Installs over ADB are not affected by any of this, so the developer-machine workflow stays intact. And once the advanced flow has been enabled, you can turn Developer options back off — the setting survives without leaving the whole developer menu exposed.
The capability is delivered through the Android Developer Verifier system service rather than an Android version update, which is why it can reach phones on older releases. Google announced the rollout in a post on Reddit’s r/Android, and 9to5Google, which read it, quotes Google calling this the “first version” of the process and says it is “rolling out gradually” — so its absence on your phone today means nothing either way.
Why the 24-hour delay exists, and what it costs you
The delay is aimed squarely at one attack: the live scam. Fraud that ends with a victim installing an APK almost always depends on urgency — a caller staying on the line, a “bank security team” walking someone through Developer options in real time. A mandatory day of waiting is one of the few defences that a scammer cannot talk their way past, and on that specific threat it should work well.
The cost is borne by people doing nothing wrong. Installing an open-source client, a regional app your bank distributes itself, or a build a friend sent you now means deciding a day in advance that you want to. That is a real reduction in what an Android phone lets its owner do on their own schedule, and it is worth naming plainly rather than filing under “safety”. The seven-day window is the sensible middle setting for most people: enough to finish what you started, short enough that a forgotten permission closes itself. We covered what the verifier service is and why it appeared on your phone in Android Developer Verifier: What It Is and Why It’s on Your Phone.
When enforcement starts
Developer verification begins on 30 September in Brazil, Indonesia, Singapore and Thailand, and goes global next year. Until then the advanced flow can appear on a phone without yet gating anything, because apps from unverified developers are not being blocked in your region yet. If you sideload regularly, the useful thing to do now is check whether the setting has arrived on your device — and if you have a habit of installing outside the Play Store, get the one-time wait out of the way before you actually need it.
Sources: 9to5Google
