Android users reporting advertisements that appear after phone calls are encountering a targeted scam rather than a system feature.
The scheme involves utility applications that request permission to display content over other apps. By gaining overlay rights, they can show ads atop the phone interface.
When a call ends, these apps launch full‑screen ads that mimic a call‑information screen. The resemblance to legitimate call interfaces reduces user suspicion.
Overlay permissions are not granted through the standard installation dialog. Users must enable them manually in system settings, which creates a loophole for malicious actors.
The apps justify the overlay requirement with claims such as alarms failing to function otherwise, or the app crashing if the permission is denied.
Because the ads surface after a call and contain unrelated content, they are difficult to trace back to the source application.
To remove the ads, check which applications have overlay rights. Uninstall any unfamiliar or unnecessary apps that possess this permission.
Routine reviews of overlay permissions help prevent unnecessary privileges and reduce potential security risks.
Although the primary impact is user annoyance, the practice also diverts advertising budgets and can damage brand trust.
